Supported CSS Properties

Safari and WebKit implement a large subset of the CSS 2.1 Specification defined by the World Wide Web Consortium (W3C), along with portions of the CSS 3 Specification. This reference describes the supported properties and provides Safari availability information. If a property is not listed here, it is not implemented by Safari and WebKit.

The CSS attributes in this article are divided according to the groups defined by the W3C CSS Specification:

Box Model

border

Defines a variety of border properties for an element within one declaration.

Syntax
border: border_width  border_style  border_color;
Parameters
border_width

The width of the border on all sides.

border_style

The style of the border.

border_color

The color of the border.

Subproperties
  • “border-color”

  • “border-style”

  • “border-width”

Support Level

CSS 2.1.

border-bottom

Defines a variety of properties for an element’s bottom border within one declaration.

Syntax
border-bottom: border_width  border_style  border_color;
Parameters
border_width

The width of the bottom border.

border_style

The style of the border.

border_color

The color of the border.

Subproperties
  • “border-bottom-color”

  • “border-bottom-style”

  • “border-bottom-width”

Support Level

CSS 2.1.

border-bottom-color

Defines the color of the bottom border of an element.

Syntax
border-bottom-color: color
Parameters
color

The color of the bottom border.

Constants
currentcolor

The value of the element’s color property.

-webkit-activelink

The default color of a hyperlink that is being clicked.

-webkit-focus-ring-color

The color that surrounds a UI element, such as a text field, that has focus.

-webkit-link

The default color of a hyperlink that has been visited.

-webkit-text

The default text color.

activeborder, activecaption, appworkspace, aqua, background, black, blue, buttonface, buttonhighlight, buttonshadow, buttontext, captiontext, fuchsia, gray, graytext, green, grey, highlight, highlighttext, inactiveborder, inactivecaption, inactivecaptiontext, infobackground, infotext, lime, maroon, match, menu, menutext, navy, olive, orange, purple, red, scrollbar, silver, teal, threeddarkshadow, threedface, threedhighlight, threedlightshadow, threedshadow, transparent, white, window, windowframe, windowtext, yellow

Discussion

Changes to this property can be animated.

Support Level

CSS 2.1.

border-bottom-style

Defines the style of the bottom border of an element.

Syntax
border-bottom-style: style;
Parameters
style

The style of the bottom border.

Constants

dashed, dotted, double, groove, hidden, inset, none, outset, ridge, solid

Support Level

CSS 2.1.

border-bottom-width

Defines the width of the bottom border of an element.

Syntax
border-bottom-width: width;
Parameters
width

The width of the bottom border.

Types Allowed

Length units

Constants

medium, thick, thin

Discussion

Changes to this property can be animated.

Support Level

CSS 2.1.

border-color

Defines the color of an element’s border.

Syntax
border-color: color;
Parameters
color

The color of the border.

Subproperties
  • border-bottom-color

  • border-left-color

  • border-right-color

  • border-top-color

Support Level

CSS 2.1.

border-left

Defines a variety of properties for an element’s left border within one declaration.

Syntax
border-left: border_width  border_style  border_color
Parameters
border_width

The width of the left border.

border_style

The style of the left border.

border_color

The color of the left border.

Subproperties
  • border-left-color

  • border-left-style

  • border-left-width

Support Level

CSS 2.1.

border-left-color

Defines the color of the left border of an element.

Syntax
border-left-color: color;
Parameters
color

The color of the left border.

Constants
currentcolor

The value of the element’s color property.

-webkit-activelink

The default color of a hyperlink that is being clicked.

-webkit-focus-ring-color

The color that surrounds a UI element, such as a text field, that has focus.

-webkit-link

The default color of a hyperlink that has been visited.

-webkit-text

The default text color.

activeborder, activecaption, appworkspace, aqua, background, black, blue, buttonface, buttonhighlight, buttonshadow, buttontext, captiontext, fuchsia, gray, graytext, green, grey, highlight, highlighttext, inactiveborder, inactivecaption, inactivecaptiontext, infobackground, infotext, lime, maroon, match, menu, menutext, navy, olive, orange, purple, red, scrollbar, silver, teal, threeddarkshadow, threedface, threedhighlight, threedlightshadow, threedshadow, transparent, white, window, windowframe, windowtext, yellow

Discussion

Changes to this property can be animated.

Support Level

CSS 2.1.

border-left-style

Defines the style of the left border of an element.

Syntax
border-left-style: style;
Parameters
style

The style of the left border.

Constants

dashed, dotted, double, groove, hidden, inset, none, outset, ridge, solid

Support Level

CSS 2.1.

border-left-width

Defines the width of the left border of an element.

Syntax
border-left-width: width;
Parameters
width

The width of the left border.

Types Allowed

Length units

Constants

medium, thick, thin

Discussion

Changes to this property can be animated.

Support Level

CSS 2.1.

border-right

Defines a variety of properties for an element’s right border within one declaration.

Syntax
border-right: border_width border_style border_color;
Parameters
border_width

The width of the right border.

border_style

The style of the right border.

border_color

The color of the right border.

Subproperties
  • border-right-color

  • border-right-style

  • border-right-width

Support Level

CSS 2.1.

border-right-color

Defines the color of the right border of an element.

Syntax
border-right-color: color;
Parameters
color

The color of the right border.

Constants
currentcolor

The value of the element’s color property.

-webkit-activelink

The default color of a hyperlink that is being clicked.

-webkit-focus-ring-color

The color that surrounds a UI element, such as a text field, that has focus.

-webkit-link

The default color of a hyperlink that has been visited.

-webkit-text

The default text color.

activeborder, activecaption, appworkspace, aqua, background, black, blue, buttonface, buttonhighlight, buttonshadow, buttontext, captiontext, fuchsia, gray, graytext, green, grey, highlight, highlighttext, inactiveborder, inactivecaption, inactivecaptiontext, infobackground, infotext, lime, maroon, match, menu, menutext, navy, olive, orange, purple, red, scrollbar, silver, teal, threeddarkshadow, threedface, threedhighlight, threedlightshadow, threedshadow, transparent, white, window, windowframe, windowtext, yellow

Discussion

Changes to this property can be animated.

Support Level

CSS 2.1.

border-right-style

Defines the style of the right border of an element.

Syntax
border-right-style: style;
Parameters
style

The style of the right border.

Constants

dashed, dotted, double, groove, hidden, inset, none, outset, ridge, solid

Support Level

CSS 2.1.

border-right-width

Defines the width of the right border of an element.

Syntax
border-right-width: width;
Parameters
width

The width of the right border.

Types Allowed

Length units

Constants

medium, thick, thin

Discussion

Changes to this property can be animated.

Support Level

CSS 2.1.

border-style

Defines the style for an element’s border.

Syntax
border-style: style;
Parameters
style

The style of the border.

Subproperties
  • border-bottom-style

  • border-left-style

  • border-right-style

  • border-top-style

Support Level

CSS 2.1.

border-top

Defines a variety of properties for an element’s top border within one declaration.

Syntax
border-top: border_width border_style border_color;
Parameters
border_width

The width of the top border.

border_style

The style of the top border.

border_color

The color of the top border.

Subproperties
  • border-top-color

  • border-top-style

  • border-top-width

Support Level

CSS 2.1.

border-top-color

Defines the color of the top border of an element.

Syntax
border-top-color: color;
Parameters
color

The color of the top border.

Constants
currentcolor

The value of the element’s color property.

-webkit-activelink

The default color of a hyperlink that is being clicked.

-webkit-focus-ring-color

The color that surrounds a UI element, such as a text field, that has focus.

-webkit-link

The default color of a hyperlink that has been visited.

-webkit-text

The default text color.

activeborder, activecaption, appworkspace, aqua, background, black, blue, buttonface, buttonhighlight, buttonshadow, buttontext, captiontext, fuchsia, gray, graytext, green, grey, highlight, highlighttext, inactiveborder, inactivecaption, inactivecaptiontext, infobackground, infotext, lime, maroon, match, menu, menutext, navy, olive, orange, purple, red, scrollbar, silver, teal, threeddarkshadow, threedface, threedhighlight, threedlightshadow, threedshadow, transparent, white, window, windowframe, windowtext, yellow

Discussion

Changes to this property can be animated.

Support Level

CSS 2.1.

border-top-style

Defines the style of the top border of an element.

Syntax
border-top-style: style;
Parameters
style

The style of the top border.

Constants

dashed, dotted, double, groove, hidden, inset, none, outset, ridge, solid

Support Level

CSS 2.1.

border-top-width

Defines the width of the top border of an element.

Syntax
border-top-width: width;
Parameters
width

The width of the top border.

Types Allowed

Length units

Constants

medium, thick, thin

Discussion

Changes to this property can be animated.

Support Level

CSS 2.1.

border-width

Defines the width of the border of an element.

Syntax
border-width: width;
Parameters
width

The width of the border.

Subproperties
  • border-bottom-width

  • border-left-width

  • border-right-width

  • border-top-width

Support Level

CSS 2.1.

margin

Defines the width of an element’s outer-element margin.

Syntax
margin: value;
margin: margin_top margin_right margin_bottom margin_left
Parameters
value

The width of the margin.

margin_top

The width of the top margin.

margin_right

The width of the right margin.

margin_bottom

The width of the bottom margin.

margin_left

The width of the left margin.

Subproperties
  • margin-bottom

  • margin-left

  • margin-right

  • margin-top

Support Level

CSS 2.1.

margin-bottom

Defines the width of the bottom margin of an element.

Syntax
margin-bottom: value;
Parameters
value

The width of the bottom margin.

Types Allowed

Numbers as a percentage, length units

Constants

auto

Discussion

Changes to this property can be animated.

Support Level

CSS 2.1.

margin-left

Defines the width of the left margin of an element.

Syntax
margin-left: value;
Parameters
value

The width of the left margin.

Types Allowed

Numbers as a percentage, length units

Constants

auto

Discussion

Changes to this property can be animated.

Support Level

CSS 2.1.

margin-right

Defines the width of the right margin of an element.

Syntax
margin-right: value;
Parameters
value

The width of the right margin.

Types Allowed

Numbers as a percentage, length units

Constants

auto

Discussion

Changes to this property can be animated.

Support Level

CSS 2.1.

margin-top

Defines the width of the top margin of an element.

Syntax
margin-top: value;
Parameters
value

The width of the top margin.

Types Allowed

Numbers as a percentage, length units

Constants

auto

Discussion

Changes to this property can be animated.

Support Level

CSS 2.1.

padding

Defines the width of an element’s inner-element padding.

Syntax
padding: value;
padding: padding_top padding_right padding_bottom padding_left
Parameters
value

The width of the padding on all sides.

padding_top

The width of the top padding.

padding_right

The width of the right padding.

padding_bottom

The width of the bottom padding.

padding_left

The width of the left padding.

Subproperties
  • padding-bottom

  • padding-left

  • padding-right

  • padding-top

Support Level

CSS 2.1.

padding-bottom

Defines the width of the bottom padding of an element.

Syntax
padding-bottom: value;
Parameters
value

The width of the bottom padding.

Types Allowed

Numbers as a percentage, length units

Discussion

Changes to this property can be animated.

Support Level

CSS 2.1.

padding-left

Defines the width of the left padding of an element.

Syntax
padding-left: value;
Parameters
value

The width of the left padding.

Types Allowed

Numbers as a percentage, length units

Discussion

Changes to this property can be animated.

Support Level

CSS 2.1.

padding-right

Defines the width of the right padding of an element.

Syntax
padding-right: value;
Parameters
value

The width of the right padding.

Types Allowed

Numbers as a percentage, length units

Discussion

Changes to this property can be animated.

Support Level

CSS 2.1.

padding-top

Defines the width of the top padding of an element.

Syntax
padding-top: value;
Parameters
value

The width of the top padding.

Types Allowed

Numbers as a percentage, length units

Discussion

Changes to this property can be animated.

Support Level

CSS 2.1.

-webkit-border-bottom-left-radius

Specifies that the bottom-left corner of a box be rounded with the specified radius.

Syntax
-webkit-border-bottom-left-radius: radius;
-webkit-border-bottom-left-radius: horizontal_radius vertical_radius;
Parameters
radius

The radius of the rounded corner.

horizontal_radius

The horizontal radius of the rounded corner.

vertical_radius

The vertical radius of the rounded corner.

Types Allowed

Length units

Subproperties
  • -webkit-border-bottom-right-radius

  • -webkit-border-radius

  • -webkit-border-top-left-radius

  • -webkit-border-top-right-radius

Discussion

This property takes either one or two parameters. If one parameter is specified, it controls both the horizontal and vertical radii of a quarter ellipse. If two parameters are specified, the first parameter normally represents the horizontal radius and the second parameter represents the remaining radius. (Compatibility note: In Internet Explorer, if writing-mode is specified as tb-rl, these parameters are reversed.)

Changes to this property can be animated.

Availability

Available in Safari 3.0 and later.

Available in iOS 1.0 and later.

Support Level

Experimental CSS 3.

-webkit-border-bottom-right-radius

Specifies that the bottom-right corner of a box be rounded with the specified radius.

Syntax
-webkit-border-bottom-right-radius: radius;
-webkit-border-bottom-right-radius: horizontal_radius vertical_radius;
Parameters
radius

The radius of the rounded corner.

horizontal_radius

The horizontal radius of the rounded corner.

vertical_radius

The vertical radius of the rounded corner.

Types Allowed

Length units

Subproperties
  • -webkit-border-bottom-left-radius

  • -webkit-border-radius

  • -webkit-border-top-left-radius

  • -webkit-border-top-right-radius

Discussion

This property takes either one or two parameters. If one parameter is specified, it controls both the horizontal and vertical radii of a quarter ellipse. If two parameters are specified, the first parameter normally represents the horizontal radius and the second parameter represents the remaining radius. (Compatibility note: In Internet Explorer, if writing-mode is specified as tb-rl, these parameters are reversed.)

Changes to this property can be animated.

Availability

Available in Safari 3.0 and later.

Available in iOS 1.0 and later.

Support Level

Experimental CSS 3.

-webkit-border-image

Specifies an image as the border for a box.

Syntax
-webkit-border-image: method top right bottom left x_repeat y_repeat
-webkit-border-image: method top right bottom left / border x_repeat y_repeat
-webkit-border-image: method top right bottom left / top_border right_border bottom_border left_border x_repeat y_repeat
Parameters
method

The method of which to produce the image. This could be expressed by the url() syntax, which contains the URI of the image (in the same fashion as the background-image property), or by a procedural function such as gradient().

top

The distance from the top edge of the image.

right

The distance from the right edge of the image.

bottom

The distance from the bottom edge of the image.

left

The distance from the left edge of the image.

x_repeat

The horizontal repeat style.

y_repeat

The vertical repeat style.

border

The width of the border on all sides.

top_border

The width of the top border.

right_border

The width of the right border.

bottom_border

The width of the bottom border.

left_border

The width of the left border.

Constants
repeat

The image is tiled.

round

The image is stretched before it is tiled to prevent partial tiles

stretch

The image is stretched to the size of the border.

Discussion

The specified image is cut into nine pieces according to the length values given. This property applies to any box, including inline elements, but does not apply to table cells if the border-collapse property is set to collapse.

The first five fields are required. The four inset values that follow method represent distances from the top, right, bottom, and left edges of the image. If no unit is specified, they represent actual pixels in the original image (assuming a raster image). If a unit (such as px) is specified, they represent CSS units (which may or may not be the same thing). The values may also be specified as a percentage of the size of the image as well as vector coordinates.

After the required fields, you can optionally include a border width field or fields, preceded by a slash (/). You can specify all four border widths individually or specify a single value that applies to all four fields. If these values are not the same size as the inset values, the slices of the original image are scaled to fit. Note that border-width constants like thick are not valid.

Finally, you can specify a repeat style in each direction. These values affect how the top, bottom, left, right, and center portions are altered to fit the required dimensions, and can be any of the following: repeat (tiled), stretch, or round (the round style is like tiling, except that it stretches all nine pieces slightly so that there is no partial tile at the end).

Availability

Available in Safari 3.0 and later.

Available in iOS 1.0 and later.

Support Level

Experimental CSS 3.

-webkit-border-radius

Specifies that the corners of a box be rounded with the specified radius.

Syntax
-webkit-border-radius: radius;
-webkit-border-radius: horizontal_radius vertical_radius;
Parameters
radius

The radius of the rounded corners.

horizontal_radius

The horizontal radius of the rounded corners.

vertical_radius

The vertical radius of the rounded corners.

Types Allowed

Length units

Subproperties
  • -webkit-border-bottom-left-radius

  • -webkit-border-bottom-right-radius

  • -webkit-border-top-left-radius

  • -webkit-border-top-right-radius

Discussion

This property takes either one or two parameters. If one parameter is specified, it controls both the horizontal and vertical radii of a quarter ellipse. If two parameters are specified, the first parameter normally represents the horizontal radius and the second parameter represents the remaining radius. (Compatibility note: In Internet Explorer, if writing-mode is specified as tb-rl, these parameters are reversed.)

Availability

Available in Safari 3.0 and later.

Available in iOS 1.0 and later.

Support Level

Experimental CSS 3.

-webkit-border-top-left-radius

Specifies that the top-left corner of a box be rounded with the specified radius.

Syntax
-webkit-border-top-left-radius: radius;
-webkit-border-top-left-radius: horizontal_radius vertical_radius;
Parameters
radius

The radius of the rounded corner.

horizontal_radius

The horizontal radius of the rounded corner.

vertical_radius

The vertical radius of the rounded corner.

Types Allowed

Length units

Subproperties
  • -webkit-border-bottom-left-radius

  • -webkit-border-bottom-right-radius

  • -webkit-border-radius

  • -webkit-border-top-right-radius

Discussion

This property takes either one or two parameters. If one parameter is specified, it controls both the horizontal and vertical radii of a quarter ellipse. If two parameters are specified, the first parameter normally represents the horizontal radius and the second parameter represents the remaining radius. (Compatibility note: In Internet Explorer, if writing-mode is specified as tb-rl, these parameters are reversed.)

Changes to this property can be animated.

Availability

Available in Safari 3.0 and later.

Available in iOS 1.0 and later.

Support Level

Experimental CSS 3.

-webkit-border-top-right-radius

Specifies that the top-right corner of a box be rounded with the specified radius.

Syntax
-webkit-border-top-right-radius: radius;
-webkit-border-top-right-radius: horizontal_radius vertical_radius;
Parameters
radius

The radius of the rounded corner.

horizontal_radius

The horizontal radius of the rounded corner.

vertical_radius

The vertical radius of the rounded corner.

Types Allowed

Length units

Subproperties
  • -webkit-border-bottom-left-radius

  • -webkit-border-bottom-right-radius

  • -webkit-border-radius

  • -webkit-border-top-left-radius

Discussion

This property takes either one or two parameters. If one parameter is specified, it controls both the horizontal and vertical radii of a quarter ellipse. If two parameters are specified, the first parameter normally represents the horizontal radius and the second parameter represents the remaining radius. (Compatibility note: In Internet Explorer, if writing-mode is specified as tb-rl, these parameters are reversed.)

Changes to this property can be animated.

Availability

Available in Safari 3.0 and later.

Available in iOS 1.0 and later.

Support Level

Experimental CSS 3.

-webkit-box-sizing

Specifies that the size of a box be measured according to either its content (default) or its total size including borders.

Syntax
-webkit-box-sizing: sizing_model;
Parameters
sizing_model

The model by which the size of the box is measured.

Constants
border-box

The box size includes borders in addition to content.

content-box

The box size only includes content.

Availability

Available in Safari 3.0 and later.

Available in iOS 1.1 and later. (Called box-sizing in iOS 1.0.)

Support Level

Experimental CSS 3.

-webkit-box-shadow

Applies a drop shadow effect to the border box of an object.

Syntax
-webkit-box-shadow: hoff voff blur color;
Parameters
hoff

The horizontal offset of the shadow.

voff

The vertical offset of the shadow.

blur

The blur radius of the shadow.

color

The color of the shadow.

Constants
none

The box has no shadow.

Discussion

This property takes four parameters. The first two are horizontal and vertical offsets—down for horizontal, and to the right for vertical. The third value is a blur radius. The fourth value is the color of the shadow. Changes to this property can be animated.

Availability

Available in Safari 3.0 and later.

Available in iOS 2.0 and later.

Support Level

Experimental CSS 3.

-webkit-margin-bottom-collapse

Specifies the behavior of an element’s bottom margin if it is adjacent to an element with a margin. Elements can maintain their respective margins or share a single margin between them.

Syntax
-webkit-margin-bottom-collapse: collapse_behavior;
Parameters
collapse_behavior

The behavior of the bottom margin.

Constants
collapse

Two adjacent margins are collapsed into a single margin.

discard

The element’s margin is discarded if it is adjacent to another element with a margin.

separate

Two adjacent margins remain separate.

Discussion

This property allows you to emulate the behavior of some browsers in quirks mode where table cell margins are collapsed into the borders of vertically adjacent cells.

Availability

Available in Safari 3.0 and later. (Called -khtml-margin-bottom-collapse in Safari 2.0.)

Available in iOS 1.0 and later.

Support Level

Apple extension.

-webkit-margin-collapse

Specifies the behavior of an element’s vertical margins if it is adjacent to an element with a margin. Elements can maintain their respective margins or share a single margin between them.

Syntax
-webkit-margin-collapse: collapse_behavior;
Parameters
collapse_behavior

The behavior of the vertical margins.

Subproperties
  • -webkit-margin-bottom-collapse

  • -webkit-margin-top-collapse

Discussion

This property allows you to emulate the behavior of some browsers in quirks mode where table cell margins are collapsed into the borders of vertically adjacent cells.

Availability

Available in Safari 3.0 and later. (Called -khtml-magin-collapse in Safari 2.0.)

Available in iOS 1.0 and later.

Support Level

Apple extension.

-webkit-margin-start

Provides the width of the starting margin.

Syntax
-webkit-margin-start: width;
Parameters
width

The width of the starting margin.

Types Allowed

Numbers as a percentage, length units

Constants
auto

The margin is automatically determined.

Discussion

If the writing direction is left-to-right, this value overrides margin-left. If the writing direction is right-to-left, this value overrides margin-right.

Availability

Available in Safari 3.0 and later. (Called it is -khtml-margin-start in Safari 2.0.)

Available in iOS 1.0 and later.

Support Level

Apple extension.

-webkit-margin-top-collapse

Specifies the behavior of an element’s top margin if it is adjacent to an element with a margin. Elements can maintain their respective margins or share a single margin between them.

Syntax
-webkit-margin-top-collapse: collapse_behavior;
Parameters
collapse_behavior

The behavior of the top margin.

Constants
collapse

Two adjacent margins are collapsed into a single margin.

discard

The element’s margin is discarded if it is adjacent to another element with a margin.

separate

Two adjacent margins remain separate.

Discussion

This property allows you to emulate the behavior of some browsers in quirks mode where table cell margins are collapsed into the borders of vertically adjacent cells.

Availability

Available in Safari 3.0 and later. (Called -khtml-magin-top-collapse in Safari 2.0.)

Available in iOS 1.0 and later.

Support Level

Apple extension.

-webkit-padding-start

Provides the width of the starting padding.

Syntax
-webkit-padding-start: width;
Parameters
width

The width of the starting padding.

Types Allowed

Numbers as a percentage, length units

Discussion

If the writing direction is left-to-right, this value overrides padding-left. If the writing direction is right-to-left, this value overrides padding-right.

Availability

Available in Safari 3.0 and later. (Called -khtml-padding-start in Safari 2.0.)

Available in iOS 1.0 and later.

Support Level

Apple extension.

Visual Formatting Model

bottom

Defines the location of the bottom edge of the element for both absolute and relative positioning.

Syntax
bottom: position;
Parameters
position

The location of the bottom edge of the element.

Types Allowed

Numbers as a percentage, length units

Constants

auto

Discussion

Changes to this property can be animated.

Availability

Available in Safari 1.0 and later.

Available in iOS 1.0 and later

Support Level

CSS 2.1.

clear

Defines the sides of an element on which no floating elements are permitted to be displayed.

Syntax
clear: value;
Parameters
value

The sides of the element on which no floating elements can be displayed.

Constants

both, left, none, right

Availability

Available in Safari 1.0 and later.

Available in iOS 1.0 and later

Support Level

CSS 2.1.

direction

Sets the direction in which text is rendered.

Syntax
direction: value;
Parameters
value

The direction of the text.

Constants

ltr, rtl

Availability

Available in Safari 1.0 and later.

Available in iOS 1.0 and later

Support Level

CSS 2.1.

display

Defines how an element is displayed onscreen.

Syntax
display: mode;
Parameters
mode

The display mode.

Constants
-webkit-box

The element is displayed in its own flex box.

-webkit-inline-box

The element is displayed inline in its own flex box.

block, compact, inline, inline-block, inline-table, list-item, none, run-in, table, table-caption, table-cell, table-column, table-column-group, table-footer-group, table-header-group, table-row, table-row-group

Availability

Available in Safari 1.0 and later.

Available in iOS 1.0 and later

Support Level

CSS 2.1.

float

Indicates whether an element (often a graphic) should be pulled out of the normal text flow and floated toward a particular horizontal position within its enclosing element.

Syntax
float: position;
Parameters
position

The position for the element to be floated toward.

Constants

center, left, none, right

Discussion

If float is set to none, the element is displayed inline wherever it appears within the text flow.

If float is set to a positional value, the element is laid out as it normally would be within the flow, then is moved as far as possible towards the specified position. If an element is vertically positioned such that it would run into another element that is part of the same float, it stops at the point of contact. Thus, in effect, this causes these floating elements to stack up at the specified horizontal position.

If the width of a series of stacked floating elements exceeds the width of the enclosing box, further elements wrap to a new row. You can force an element to always wrap to a new row by setting the clear property on that element. (See “clear” for more information.)

Note: With the exception of elements with intrinsic width (an img tag, for example), you should always set the width property on floating elements to ensure consistent behavior across browsers.

Availability

Available in Safari 1.0 and later.

Available in iOS 1.0 and later

Support Level

CSS 2.1.

height

Defines the height of a structural element.

Syntax
height: value;
Parameters
value

The height of the element.

Types Allowed

Numbers as a percentage, length units, nonnegative values

Constants

auto, intrinsic, min-intrinsic

Discussion

This property has no effect on inline elements. Changes to this property can be animated.

Availability

Available in Safari 1.0 and later.

Available in iOS 1.0 and later

Support Level

CSS 2.1.

left

Defines the location of the left edge of the element for both absolute and relative positioning.

Syntax
left: position;
Parameters
position

The location of the left edge of the element.

Types Allowed

Numbers as a percentage, length units

Constants

auto

Discussion

Changes to this property can be animated.

Availability

Available in Safari 1.0 and later.

Available in iOS 1.0 and later

Support Level

CSS 2.1.

line-height

Defines the vertical interline spacing of lines within the text of an element.

Syntax
line-height: height;
Parameters
height

The interline spacing value.

Types Allowed

Floating-point numbers, Numbers as a percentage, length units

Constants

normal

Discussion

Changes to this property can be animated.

Availability

Available in Safari 1.0 and later.

Available in iOS 1.0 and later

Support Level

CSS 2.1.

max-height

Defines the maximum height of a structural element.

Syntax
max-height: height;
Parameters
height

The maximum height.

Constants

intrinsic, min-intrinsic, none

Availability

Available in Safari 1.3 and later. (Positioned elements require Safari 2.0.2 and later.)

Available in iOS 1.0 and later.

Support Level

CSS 2.1.

max-width

Defines the maximum width of a structural element.

Syntax
max-width: width;
Parameters
width

The maximum width.

Constants

intrinsic, min-intrinsic, none

Availability

Available in Safari 1.0 and later. (Positioned elements require Safari 2.0.2 and later.)

Available in iOS 1.0 and later.

Support Level

CSS 2.1.

min-height

Defines the minimum height of a structural element.

Syntax
min-height: height;
Parameters
height

The minimum height.

Types Allowed

Numbers as a percentage, length units, nonnegative values

Constants

intrinsic, min-intrinsic

Availability

Available in Safari 1.3 and later. (Positioned elements require Safari 2.0.2 and later.)

Available in iOS 1.0 and later.

Support Level

CSS 2.1.

min-width

Defines the minimum width of a structural element.

Syntax
min-width: width;
Parameters
width

The minimum width.

Types Allowed

Numbers as a percentage, length units, nonnegative values

Constants

intrinsic, min-intrinsic

Availability

Available in Safari 1.0 and later. (Positioned elements require Safari 2.0.2 and later.)

Available in iOS 1.0 and later.

Support Level

CSS 2.1.

opacity

Specifies how to blend the offscreen rendering into the current composite rendering.

Syntax
opacity: value;
Parameters
value

The opacity.

Types Allowed

Floating-point numbers

Discussion

Changes to this property can be animated.

Availability

Available in Safari 2.0 and later. (Called -khtml-opacity in Safari 1.1.)

Available in iOS 1.0 and later.

Support Level

CSS 2.1.

position

Specifies how an element is positioned.

Syntax
position: positioning_model;
Parameters
positioning_model

The positioning model for the element.

Constants

absolute, fixed, relative, static

Discussion

This property affects the behavior of positional properties such as float and left/right/top/bottom.

Support Level

CSS 2.1.

right

Defines the location of the right edge of the element for both absolute and relative positioning.

Syntax
right: position;
Parameters
position

The location of the right edge of the element.

Types Allowed

Numbers as a percentage, length units

Constants

auto

Discussion

Changes to this property can be animated.

Support Level

CSS 2.1.

top

Defines the location of the top edge of the element for both absolute and relative positioning.

Syntax
top: position;
Parameters
position

The opacity.

Types Allowed

The location of the top edge of the element.

Constants

auto

Discussion

Changes to this property can be animated.

Support Level

CSS 2.1.

unicode-bidi

Defines the Unicode bidirectional text algorithm used to display text.

Syntax
unicode-bidi: algorithm;
Parameters
algorithm

The bidirectional text algorithm.

Constants

bidi-override, embed, normal

Discussion

This property must be set if you intend to change the direction of inline text.

Support Level

CSS 2.1.

vertical-align

Defines the vertical alignment of elements inline with text.

Syntax
vertical-align: position;
Parameters
position

The vertical alignment of the text.

Types Allowed

Numbers as a percentage, length units

Constants
-webkit-baseline-middle

The center of the element is aligned with the baseline of the text.

baseline, bottom, middle, sub, super, text-bottom, text-top, top

Support Level

CSS 2.1.

width

Defines the width of a structural element.

Syntax
width: value;
Parameters
value

The width of the element.

Types Allowed

Numbers as a percentage, length units, nonnegative values

Constants

auto, intrinsic, min-intrinsic

Discussion

This property has no effect on inline elements. Changes to this property can be animated.

Support Level

CSS 2.1.

z-index

Overrides the default stacking order of elements.

Syntax
z-index: distance;
Parameters
distance

The z-index of the element.

Constants

auto

Discussion

Formally, the z-index property sets the height of an element above the drawing plane (in pixels). Its primary use is to override the default stacking order of elements.

By default, elements are stacked in the order in which they appear within the DOM tree; later elements appear on top of earlier elements. If you set a z-index value for an element, that element is displayed on top of all elements with a lower z-index value, underneath all elements with a higher z-index value, and stacked according to its position in the DOM tree relative to all elements with the same z-index value.

By default, elements are assigned a z-index value of auto, which is equivalent to zero (0).

Changes to this property can be animated.

Support Level

CSS 2.1.

zoom

Specifies the magnification of an element.

Syntax
zoom: vMagnification;
Parameters
vMagnification

The magnification of the element.

Types Allowed

Numbers as a percentage, floating-point numbers, nonnegative values

Constants
normal

A zoom level of 100%.

reset

Specifies that an element not scale at all when a zoom is applied.

Discussion

Children of elements with the zoom property do not inherit the property, but they are affected by it. The default value of the zoom property is normal, which is equivalent to a percentage value of 100% or a floating-point value of 1.0.

Changes to this property can be animated.

Availability

Available in Safari 4.0 and later.

Support Level

Apple extension.

Visual Effects

clip

Defines the clipping region.

Syntax
clip: shape;
Parameters
shape

The clipping region.

Constants

auto

Discussion

A clipping region is the portion of an element in which its content will be rendered. The default is to render content within the entire element size.

If you do not use the constant auto, the value should be in the form of a supported shape (currently limited to rect).

For example, clip: rect(3px 20px 5px 8px); defines a rectangular clip region with a top edge 3 pixels from the top of the element, a right edge 20 pixels from the left edge of the element, a bottom border 5 pixels from the top of the element, and a left border 8 pixels from the left edge of the element.

Support Level

CSS 2.1.

overflow

Defines the treatment of content that overflows the element’s bounds.

Syntax
overflow: behavior;
Parameters
behavior

The overflow behavior.

Subproperties
  • overflow-x

  • overflow-y

Discussion

This property allows you to choose the behavior for content that overflows the element bounds, such as providing scroll bars or hiding the overflowed content.

Support Level

CSS 2.1.

overflow-x

Defines the treatment of content that overflows the element’s horizontal bounds.

Syntax
overflow-x: behavior;
Parameters
behavior

The overflow behavior.

Constants
-webkit-marquee

The content behaves like a marquee.

auto, hidden, overlay, scroll, visible

Availability

Available in Safari 3.0 and later.

Available in iOS 1.0 and later.

Support Level

Stable CSS 3.

overflow-y

Defines the treatment of content that overflows the element’s vertical bounds.

Syntax
overflow-y: behavior;
Parameters
behavior

The overflow behavior.

Constants
-webkit-marquee

The content behaves like a marquee.

auto, hidden, overlay, scroll, visible

Availability

Available in Safari 3.0 and later.

Available in iOS 1.0 and later.

Support Level

Stable CSS 3.

resize

Specifies the directions in which resizing is allowed.

Syntax
resize: direction;
Parameters
direction

The directions in which resizing is allowed.

Constants

auto, both, horizontal, none, vertical

Availability

Available in Safari 3.0 and later.

Available in iOS 1.0 and later.

Support Level

Stable CSS 3.

visibility

Defines whether or not an element is visible onscreen.

Syntax
visibility: value;
Constants

collapse, hidden, visible

Discussion

Note that elements made invisible using this property still take up space onscreen. Changes to this property can be animated.

Availability

Available in Safari 1.0 and later. (All supported except for collapse.)

Available in iOS 1.0 and later.

Support Level

CSS 2.1.

-webkit-animation

Combines common animation properties into a single property.

Syntax
-webkit-animation: name duration timing_function delay iteration_count direction [, ... ];
Parameters
name

See “-webkit-animation-name” for details.

duration

See “-webkit-animation-duration” for details.

timing_function

See “-webkit-animation-timing-function” for details.

delay

See “-webkit-animation-delay” for details.

iteration-count

See “-webkit-animation-iteration-count” for details.

direction

See “-webkit-animation-direction” for details.

Discussion

Refer to the respective property for details of each property and default values.

Availability

Available in iOS 2.0 and later.

Available in Safari 4.0 and later.

Support Level

Apple extension.

-webkit-animation-delay

Defines when an animation starts.

Syntax
-webkit-animation-delay: time [, ...];
Parameters
time

The time to begin executing an animation after it is applied. If 0, the animation executes as soon as it is applied. If positive, it specifies an offset from the moment the animation is applied, and the animation delays execution by that offset. If negative, the animation executes the moment the property changes but appears to begin at the specified negative offset—that is, begins part-way through the animation. Nonzero values must specify a unit: s for seconds, ms for milliseconds. The default value is 0.

Constants
now

The animation begins immediately.

Available in iOS 2.0 and later.

Discussion

This property allows an animation to begin execution some time after it is applied.

Availability

Available in iOS 2.0 and later.

Available in Safari 4.0 and later.

Support Level

Apple extension.

-webkit-animation-direction

Determines whether the animation should play in reverse on alternate iterations.

Syntax
-webkit-animation-direction: direction [, ...]
Parameters
direction

The direction to play. The default value is normal.

Constants
normal

Play each iteration of the animation in the forward direction.

alternate

Play even-numbered iterations of the animation in the forward direction and odd-numbered iterations in the reverse direction.

When an animation is played in reverse, the timing functions are also reversed. For example, when played in reverse, an ease-in animation appears as an ease-out animation.

Availability

Available in iOS 2.0 and later.

Available in Safari 4.0 and later.

Support Level

Apple extension.

-webkit-animation-duration

Specifies the length of time that an animation takes to complete one iteration.

Syntax
-webkit-animation-duration: time [, ...]
Parameters
time

The duration of an animation. If 0, the animation iteration is immediate (there is no animation). A negative value is treated as 0. The default value is 0.

Availability

Available in iOS 2.0 and later.

Available in Safari 4.0 and later.

Support Level

Apple extension.

-webkit-animation-fill-mode

Specifies whether the effects of an animation are apparent before the animation starts and after it ends.

Syntax
-webkit-animation-fill-mode: mode [, ...]
Parameters
mode

The animation’s fill mode. Can be none, forwards, backwards, or both.

Constants
none

The effects of the animation are apparent only during the defined duration of the animation.

forwards

The animation’s final keyframe continues to apply after the final iteration of the animation completes.

backwards

The animation’s initial keyframe is applied as soon as the animation style is applied to an element. This only affects animations that have a nonzero value for -webkit-animation-delay.

both

The animation’s initial keyframe is applied as soon as the animation style is applied to an element, and the animation’s final keyframe continues to apply after the final iteration of the animation completes. The initial keyframe only affects animations that have a nonzero value for -webkit-animation-delay.

Discussion

By default, an animation starts as soon as the style that describes the animation is applied to an element; however, the -webkit-animation-delay property can delay the start of an animation. Specifying a value of backwards or both for this property overrides the -webkit-animation-delay property and tells the animation to start as soon as the style is applied.

Availability

Available in Safari 5.0 and later.

Available in iOS 4.0 and later.

Support Level

Apple extension.

-webkit-animation-iteration-count

Specifies the number of times an animation iterates.

Syntax
-webkit-animation-iteration-count: number [, ...]
Parameters
number

The number of iterations. If 1, the animation plays from beginning to end once. A value of infinite causes the animation to repeat forever. Noninteger values cause the animation to end partway through an interation. Negative values are invalid. The default value is 1.

Constants
infinite

Repeats the animation forever.

Discussion

This property is often used with a -webkit-animation-direction property set to alternate, which causes the animation to play in reverse on alternate iterations.

Availability

Available in iOS 2.0 and later.

Available in Safari 4.0 and later.

Support Level

Apple extension.

-webkit-animation-name

Specifies the name of an animation.

Syntax
-webkit-animation-name: name [, ...]
Parameters
name

The name of the animation.

The name is used to select the -webkit-keyframe at-rule that provides the keyframes and property values for the animation. If the name does not match any -webkit-keyframe at-rule, there are no properties to be animated and the animation is not executed. See “@-webkit-keyframes” for a description of this rule.

If "none", no animation is executed even if there is a -webkit-keyframe at-rule with that name. Setting this property to "none" explicitly disables animations.

The default value is "".

Availability

Available in iOS 2.0 and later.

Available in Safari 4.0 and later.

Support Level

Apple extension.

-webkit-animation-play-state

Determines whether the animation is running or paused.

Syntax
-webkit-animation-play-state: play_state [, ...]
Parameters
play_state

The state of an animation.

Constants
running

Plays the animation.

paused

Pauses the animation.

Discussion

A running animation can be paused by setting this property to paused. Set this property to running to continue running a paused animation. A paused animation continues to display the current value of the animation in a static state. When a paused animation is resumed, it restarts from the current value, not from the beginning of the animation.

The default value is running.

Availability

Available in iOS 2.0 and later.

Available in Safari 4.0 and later.

Support Level

Apple extension.

-webkit-animation-timing-function

Defines how an animation progresses between keyframes.

Syntax
-webkit-animation-timing-function: function [, ...]
Parameters
function

The function to apply between keyframes. The default value is ease.

Constants
ease

Equivalent to cubic-bezier(0.25, 0.1, 0.25, 1.0).

Availability

Available in iOS 2.0 and later.

Available in Safari 4.0 and later.

linear

Equivalent to cubic-bezier(0.0, 0.0, 1.0, 1.0).

Availability

Available in iOS 2.0 and later.

Available in Safari 4.0 and later.

ease-in

Equivalent to cubic-bezier(0.42, 0, 1.0, 1.0).

Availability

Available in iOS 2.0 and later.

Available in Safari 4.0 and later.

ease-out

Equivalent to cubic-bezier(0, 0, 0.58, 1.0).

Availability

Available in iOS 2.0 and later.

Available in Safari 4.0 and later.

ease-in-out

Equivalent to cubic-bezier(0.42, 0, 0.58, 1.0).

Availability

Available in iOS 2.0 and later.

Available in Safari 4.0 and later.

step-end

Equivalent to steps(1, end).

Availability

Available in iOS 5.0 and later.

Available in Safari 5.1 and later.

step-start

Equivalent to steps(1, start).

Availability

Available in iOS 5.0 and later.

Available in Safari 5.1 and later.

Discussion

The timing function is specified using a cubic Bezier curve. Use the constants to specify preset points of the curve or the cubic-bezier function to specify your own points. See cubic-bezier for a description of the parameters for this function. See “Timing Functions” for additional information about timing functions.

This property applies between keyframes, not over the entire animation. For example, for an ease-in-out timing function, an animation eases in at the start of the keyframe and eases out at the end of the keyframe. A -webkit-animation-timing-function defined within a keyframe block applies to that keyframe; otherwise, the timing function specified for the animation is used.

Availability

Available in iOS 2.0 and later.

Available in Safari 4.0 and later.

Support Level

Apple extension.

-webkit-backface-visibility

Determines whether or not a transformed element is visible when it is not facing the screen.

Syntax
-webkit-backface-visibility: visibility;
Parameters
visibility

Determines whether or not the back face of a transformed element is visible. The default value is visible.

Constants
visible

The element is always visible even when it is not facing the screen.

hidden

The element is invisible if it is not facing the screen.

Discussion

Use this property to specify whether or not an element is visible when it is not facing the screen. For example, if the identity transform is set, an element faces the screen; otherwise, it may face away from the screen. For example, applying a rotation about y of 180 degrees in the absence of any other transforms causes an element to face away from the screen.

This property is useful when you place two elements back to back, as you would do to create a playing card. Without this property, the front and back elements could at times switch places during an animation to flip the card. Another example is creating a box out of six elements whose outside and inside faces can be viewed. This is useful when creating the backdrop for a three-dimensional stage.

Availability

Available in iOS 2.0 and later.

Support Level

Apple extension.

-webkit-box-reflect

Defines a reflection of a border box.

Syntax
-webkit-box-reflect: direction  offset  mask-box-image;
Parameters
direction

The position of the reflection relative to the border box. Can be above, below, left, or right.

offset

The distance of the reflection from the edge of the border box, in length units or as a percentage. The default value is 0.

mask-box-image

Used to overlay the reflection. If omitted, the reflection has no mask.

Constants
above

The reflection appears above the border box.

below

The reflection appears below the border box.

left

The reflection appears to the left of the border box.

right

The reflection appears to the right of the border box.

Discussion

Reflections will update automatically as the source changes. Specifying a reflection has the effect of creating a stacking context (like opacity, masks, and transforms). The reflection is non-interactive, and as such, it has no effect on hit testing. The reflection has no effect on layout, other than being part of a container’s overflow; it is similar to -webkit-box-shadow in this respect.

Availability

Available in iOS 2.0 and later.

Support Level

Apple extension.

-webkit-mask

Defines a variety of mask properties within one declaration.

Syntax
-webkit-mask: attachment, clip, origin, image, repeat, composite, box-image;
Parameters
attachment

See “-webkit-mask-attachment” for details.

clip

See “-webkit-mask-clip” for details.

origin

See “-webkit-mask-origin” for details.

image

See “-webkit-mask-image” for details.

repeat

See “-webkit-mask-repeat” for details.

composite

See “-webkit-mask-composite” for details.

Discussion

As with most composite properties, all arguments are optional.

Availability

Available in Safari 4.0 and later.

Support Level

Apple extension.

-webkit-mask-attachment

Defines the scrolling or fixed nature of the image mask.

Syntax
-webkit-mask-attachment: mask-attachment;
Parameters
mask-attachment

If fixed, the mask does not move when the page scrolls; if scroll, the image moves when the page scrolls.

Availability

Available in Safari 4.0 and later.

Support Level

Apple extension.

-webkit-mask-box-image

Defines an image to be used as a mask for a border box.

Syntax
-webkit-mask-box-image: uri top right bottom left x_repeat y_repeat
Parameters
uri

The file path of the image.

top

The distance from the top edge of the image.

right

The distance from the right edge of the image.

bottom

The distance from the bottom edge of the image.

left

The distance from the left edge of the image.

x_repeat

The horizontal repeat style.

y_repeat

The vertical repeat style.

Discussion

The uri field contains the URI for the image. The four inset values that follow represent distances from the top, right, bottom, and left edges of the image. If no unit is specified, they represent actual pixels in the original image (assuming a raster image). If a unit (such as px) is specified, they represent CSS units (which may or may not be the same thing). The values may also be specified as a percentage of the size of the image.

You can specify a repeat style in each direction. These values affect how the top, bottom, left, right, and center portions are altered to fit the required dimensions, and can be any of the following: repeat (tiled), stretch, or round (the round style is like tiling, except that it stretches all nine pieces slightly so that there is no partial tile at the end).

Availability

Available in Safari 4.0 and later.

Support Level

Apple extension.

-webkit-mask-clip

Specifies whether the mask should extend into the border of a box.

Syntax
-webkit-mask-clip: behavior;
Parameters
behavior

The clipping behavior of the mask.

Availability

Available in Safari 4.0 and later.

Support Level

Apple extension.

-webkit-mask-composite

Sets a compositing style for a mask.

Syntax
-webkit-mask-composite: compositing_style;
Parameters
compositing_style

The compositing style of the mask.

Discussion

The default value is border, which means that the background extends into the border area. Specifying a value of padding limits the background so that it extends only into the padding area enclosed by the border.

Availability

Available in Safari 4.0 and later.

Support Level

Apple extension.

-webkit-mask-image

Defines an image to be used as a mask for an element.

Syntax
-webkit-mask-image: value;
Parameters
value

The file path of the image.

Availability

Available in Safari 4.0 and later.

Support Level

Apple extension.

-webkit-mask-origin

Determines where the -webkit-mask-position property is anchored.

Syntax
-webkit-mask-origin: origin;
Parameters
origin

The origin of the mask position.

Constants
border

The mask’s position is anchored at the upper-left corner of the element’s border.

content

The mask’s position is anchored at the upper-left corner of the element’s content.

padding

The mask’s position is anchored at the upper-left corner of the element’s padding.

Availability

Available in Safari 4.0 and later.

Support Level

Apple extension.

-webkit-mask-position

Defines the position of a mask.

Syntax
-webkit-mask-position: xpos;
-webkit-mask-position: xpos ypos;
Parameters
xpos

The x-coordinate of the position of the mask.

ypos

The y-coordinate of the position of the mask.

Discussion

Position can be specified in terms of pixels or percentages of the viewport width or using the keywords top, left, center, right, or bottom.

Changes to this property can be animated in Safari 4.0 and later.

Availability

Available in Safari 4.0 and later.

Support Level

Apple extension.

-webkit-mask-position-x

Defines the x-coordinate of the position of a mask.

Syntax
-webkit-mask-position-x: value;
Parameters
value

The x-coordinate of the position of the mask.

Availability

Available in Safari 4.0 and later.

Support Level

Apple extension.

-webkit-mask-position-y

Defines the y-coordinate of the position of a mask.

Syntax
-webkit-mask-position-y: value;
Parameters
value

The y-coordinate of the position of the mask.

Availability

Available in Safari 4.0 and later.

Support Level

Apple extension.

-webkit-mask-repeat

Defines the repeating qualities of a mask.

Syntax
-webkit-mask-repeat: value;
Parameters
value

The repeating behavior of the mask.

Discussion

This property controls whether tiling of an element’s mask should occur in the x direction, the y direction, both, or neither.

Availability

Available in Safari 4.0 and later.

Support Level

Apple extension.

-webkit-mask-size

Overrides the size of a mask.

Syntax
-webkit-mask-size: length;
-webkit-mask-size: length_x length_y;
Parameters
length

The width and height of the mask.

length_x

The width of the mask.

length_y

The height of the mask.

Discussion

Changes to this property can be animated in Safari 4.0 and later.

Availability

Available in Safari 4.0 and later.

Support Level

Apple extension.

-webkit-perspective

Gives depth to a scene, causing elements farther away from the viewer to appear smaller.

Syntax
-webkit-perspective: value;
Parameters
value

The distance in pixels from the viewer’s position to the z=0 plane. The default value is none.

Constants
none

No perspective transform is applied.

Discussion

The -webkit-perspective property applies the same transform as the perspective(<number>) transform function, except that it applies only to the children of the element, not to the transform on the element itself.

The use of this property with any value other than none establishes a stacking context. It also establishes a containing block (somewhat similar to position:relative), just as the -webkit-transform property does.

This transform alters the effect of other transforms. In the absence of additional transforms, this transform has no effect.

Availability

Available in Safari 4.0.3 and later running on Mac OS X v10.6 and later.

Available in iOS 2.0 and later.

Support Level

Apple extension.

-webkit-perspective-origin

Sets the origin of the -webkit-perspective property described in “-webkit-perspective.”

Syntax
-webkit-perspective-origin: posx posy;
Parameters
posx

The x-origin as a percentage or value.

posy

The y-origin as a percentage or value.

Constants
top

Sets the y-origin to the top of the element’s border box.

center

Sets the x or y origin to the center of the element’s border box. If this constant appears before left or right, specifies the y-origin. If it appears after top or bottom, specifies the x-origin. If appears alone, centers both the x and y origin.

bottom

Sets the y-origin to the bottom of the element’s border box.

left

Sets the x-origin to the left side of the border box.

right

Sets the x-origin to the right side of the border box.

Discussion

This property effectively sets the x and y position at which the viewer appears to be looking at the children of the element. The default value is 50% for both x and y coordinates.

Availability

Available in Safari 4.0.3 and later running on Mac OS X v10.6 and later.

Available in iOS 2.0 and later.

Support Level

Apple extension.

-webkit-transform

Specifies transformations to be applied to an element.

Syntax
-webkit-transform: function ... ;
Parameters
function

A transform function. Possible values are described in “Transform Functions.”

Constants
none

No transforms are applied.

Discussion

The -webkit-transform property specifies a list of transformations, separated by whitespace, to be applied to an element, such as rotation, scaling, and so on.

The set of transform functions is similar to those allowed by SVG, although there are additional functions to support 3D transformations. If multiple transforms are applied, the transform is generated by performing a matrix concatenation of each transform in the list.

For example, the following div element is rotated 45 degrees clockwise:

<div style="width: 12em; margin-top: 5em;
            -webkit-transform: rotate(45deg)">...</div>

If a list of transforms is provided, the net effect is as if each transform is specified separately in the order provided.

The default value is none (no transforms applied).

Changes to this property can be animated.

Availability

Available in Safari 3.1 and later.

Available in iOS 2.0 and later.

Support Level

Apple extension.

-webkit-transform-origin

Sets the origin for the “-webkit-transform” property.

Syntax
-webkit-transform-origin: posx
-webkit-transform-origin: posx posy
Parameters
posx

The x origin as a percentage or value.

posy

The y origin as a percentage or value.

Constants
top

Sets the y origin to the top of the element’s border box.

center

Sets the x or y origin to the center of the element’s border box. If this constant appears before left or right, specifies the y origin. If this constant appears after top or bottom, specifies the x origin. If it appears alone, centers both the x and y origin.

bottom

Sets the y origin to the bottom of the element’s border box.

left

Sets the x origin to the left side of the border box.

right

Sets the x origin to the right side of the border box.

Discussion

The -webkit-transform-origin property establishes the origin for transforms applied to an element with respect to its border box.

The values may be expressed either as a CSS length unit or as a percentage of the element’s size. For example, a value of 50% 50% causes transformations to occur around the element’s center. Changing the origin to 100% 0% causes transformation to occur around the top-right corner of the element. The default value is 50% 50%.

If only one argument is provided, it is interpreted as the horizontal position.

Availability

Available in Safari 3.1 and Later.

Available in iOS 2.0 and later.

Support Level

Apple extension.

-webkit-transform-origin-x

The x coordinate of the origin for transforms applied to an element with respect to its border box.

Syntax
-webkit-transform-origin-x: posx
Parameters
posx

The x origin as a percentage or value.

Discussion

The values may be expressed either as a CSS length unit or as a percentage of the element’s size. For example, a value of 50% 50% causes transformations to occur around the element’s center. Changing the origin to 100% 0% causes transformation to occur around the top-right corner of the element. The default value is 50% 50%.

Changes to this property can be animated.

Availability

Available in Safari 3.1 and Later.

Available in iOS 2.0 and later.

Support Level

Apple extension.

-webkit-transform-origin-y

The y coordinate of the origin for transforms applied to an element with respect to its border box.

Syntax
-webkit-transform-origin-y: posy
Parameters
posy

The y origin as a percentage or value.

Discussion

The values may be expressed either as a CSS length unit or as a percentage of the element’s size. For example, a value of 50% 50% causes transformations to occur around the element’s center. Changing the origin to 100% 0% causes transformation to occur around the top-right corner of the element. The default value is 50% 50%.

Changes to this property can be animated.

Availability

Available in Safari 3.1 and Later.

Available in iOS 2.0 and later.

Support Level

Apple extension.

-webkit-transform-origin-z

The z coordinate of the origin for transforms applied to an element with respect to its border box.

Syntax
-webkit-transform-origin-z: posz
Parameters
posz

The z origin as a percentage or value.

Discussion

The values may be expressed either as a CSS length unit or as a percentage of the element’s size. For example, a value of 50% 50% causes transformations to occur around the element’s center. Changing the origin to 100% 0% causes transformation to occur around the top-right corner of the element. The default value is 50% 50%.

Changes to this property can be animated.

Availability

Available in Safari 4.0.3 and later running on Mac OS X v10.6 and later.

Available in iOS 2.0 and later.

Support Level

Apple extension.

-webkit-transform-style

Defines how nested, transformed elements are rendered in 3D space.

Syntax
-webkit-transform-style: style;
Parameters
style

The transform style.

Constants
flat

Flatten all children of this element into the 2D plane.

preserve-3d

Preserve the 3D perspective.

Discussion

If -webkit-transform-style is flat, all children of this element are rendered flattened into the 2D plane of the element. Therefore, rotating the element about the x or y axes causes children positioned at positive or negative z positions to appear on the element’s plane, rather than in front of or behind it. If -webkit-transform-style is preserve-3d, this flattening is not performed, so children maintain their position in 3D space.

This flattening takes place at each element, so preserving a hierarchy of elements in 3D space requires that each ancestor in the hierarchy have the value preserve-3d for -webkit-transform-style. But -webkit-transform-style affects only an element’s children; the leaf nodes in a hierarchy do not require the preserve-3d style.

The default value is flat.

Availability

Available in Safari 4.0.3 and later running on Mac OS X v10.6 and later.

Available in iOS 2.0 and later.

Support Level

Apple extension.

-webkit-transition

Combines -webkit-transition-delay,-webkit-transition-duration,-webkit-transition-property, and -webkit-transition-timing-function into a single property.

Syntax
-webkit-transition: property duration timing_function delay [, ...]
Parameters
property

See “-webkit-transition-property” for details.

duration

See “-webkit-transition-duration” for details.

timing_function

See “-webkit-transition-timing-function” for details.

delay

See “-webkit-transition-delay” for details.

Availability

Available in Safari 3.1 and Later.

Available in iOS 2.0 and later.

Support Level

Apple extension.

-webkit-transition-delay

Defines when the transition starts.

Syntax
-webkit-transition-delay: time [, ...]
Parameters
time

The time to begin executing a transition after it is applied. If 0, the transition executes as soon as the property changes. Otherwise, the value specifies an offset from the moment the property changes, and the transition delays execution by that offset. If the value is negative, the transition executes the moment the property changes but appears to begin at the specified negative offset—that is, begins part-way through the transition. Nonzero values must specify a unit: s for seconds, ms for milliseconds. Negative values are invalid. The default value is 0.

Constants
now

The transition begins immediately.

Available in iOS 2.0 and later.

Availability

Available in iOS 2.0 and later.

Available in Safari 4.0 and later.

Support Level

Apple extension.

-webkit-transition-duration

Defines how long the transition from the old value to the new value should take.

Syntax
-webkit-transition-duration: time [, ...]
Parameters
time

If 0, the transition is immediate (there is no animation). A negative value is treated as 0. Nonzero values must specify a unit: s for seconds, ms for milliseconds. Negative values are invalid. The default value is 0.

Availability

Available in Safari 3.1 and Later.

Available in iOS 2.0 and later.

Support Level

Apple extension.

-webkit-transition-property

Specifies the name of the CSS property to which the transition is applied.

Syntax
-webkit-transition-property: name;
Parameters
name

The name of the transition. You can list multiple properties. Property names should be bare, unquoted names. The default value is all.

Constants
none

No transition specified.

all

The default transition name.

Availability

Available in Safari 3.1 and Later.

Available in iOS 2.0 and later.

Support Level

Apple extension.

-webkit-transition-timing-function

Specifies how the intermediate values used during a transition are calculated.

Syntax
-webkit-transition-timing-function: timing_function [, ...]
Parameters
timing_function

The timing function.

Constants
ease

Equivalent to cubic-bezier(0.25, 0.1, 0.25, 1.0).

linear

Equivalent to cubic-bezier(0.0, 0.0, 1.0, 1.0).

ease-in

Equivalent to cubic-bezier(0.42, 0, 1.0, 1.0).

ease-out

Equivalent to cubic-bezier(0, 0, 0.58, 1.0).

ease-in-out

Equivalent to cubic-bezier(0.42, 0, 0.58, 1.0).

Discussion

This property allows for a transition to change speed over its duration. These effects, commonly called easing functions, are mathematical functions that produce a smooth curve.

The timing function is specified using a cubic Bezier curve. Use the constants to specify preset points of the curve or the cubic-bezier function to specify your own points. See cubic-bezier for a description of the parameters for this function.

The timing function takes as its input the current elapsed percentage of the transition duration and outputs a percentage that determines how close the transition is to its goal state.

The default value is ease.

Availability

Available in Safari 3.1 and Later.

Available in iOS 2.0 and later.

Support Level

Apple extension.

Generated Content, Automatic Numbering, and Lists

content

Embeds an arbitrary batch of content (such as a movie or a specially formatted string) to be embedded alongside a CSS property.

Syntax
content: value;
content: function;
Parameters
value

The file path of the content.

function

A function that procedurally generates an image, such as gradient.

Support Level

CSS 2.1.

counter-increment

Increments a numerical counter for auto-numbering.

Syntax
counter-increment: counter_name increment_by;
Parameters
counter_name

The name of the counter.

increment_by

The amount by which the counter increments.

Constants

none

Discussion

This property is commonly used in conjunction with the “content” property to create section numbers or other auto-numbered containers. For example:

<style>
    p#top {
        counter-reset: section;
    }
 
    h1:before
    {
        content: "Section " counter(section) " ";
        counter-increment: section 1;
    }
</style>
 
<p id="top">This resets the counter.</p>
 
<H1>First section</H1>
<H1>Next section</H1>

This snippet inserts “Section 1:” at the beginning of the first heading, “Section 2:” at the beginning of the second, and so on.

Important: You must use the “counter-reset” property to reset the counter on some element that appears in the DOM tree prior to the first element where you use counter-increment on that counter. Otherwise, this call increments a nonexistent counter and all of your sections will be numbered "Section 1”.

Availability

Available in Safari 3.0 and later.

Available in iOS 1.0 and later.

Support Level

CSS 2.1.

counter-reset

Resets a counter used by the “counter-increment” property and the counter function.

Syntax
counter-reset: counter_name
Parameters
counter_name

The name of the counter.

Constants

none

Discussion

For an example of this property, see the documentation for “counter-increment.”

Availability

Available in Safari 3.0 and later.

Support Level

CSS 2.1.

list-style

Defines the display style for a list and list elements.

Syntax
list-style: type position image;
Parameters
type

The type of list.

position

The position of the list marker.

image

The file path of an image to be used as the list marker.

Subproperties
  • list-style-image

  • list-style-position

  • list-style-type

Discussion

As with most composite properties, all arguments are optional.

Support Level

CSS 2.1.

list-style-image

Defines an image to use as the opening symbol of a list element.

Syntax
list-style-image: value
list-style-image: function
Parameters
value

The file path of the image.

function

A function that procedurally generates an image, such as gradient.

Support Level

CSS 2.1.

list-style-position

Defines the position of the marker of a list element.

Syntax
list-style-position: value
Parameters
value

The position of the marker.

Constants
inside

The marker is placed inside the text. Wrapping text appears directly below the marker.

outside

The text of the list item is indented from the marker.

Support Level

CSS 2.1.

list-style-type

Defines the type of marker of a list element.

Syntax
list-style-type: value
Parameters
value

The type of marker.

Constants

armenian, circle, cjk-ideographic, decimal, decimal-leading-zero, disc, georgian, hebrew, hiragana, hiragana-iroha, katakana, katakana-iroha, lower-alpha, lower-greek, lower-latin, lower-roman, none, square, upper-alpha, upper-latin, upper-roman

Support Level

CSS 2.1.

Paged Media

orphans

Defines the minimum number of lines in a paragraph that must be left at the bottom of a page (before a page break).

Syntax
orphans: number_of_lines
Parameters
number_of_lines

The number of lines.

Types Allowed

Integers

Availability

Available in Safari 1.3 and later.

Support Level

CSS 2.1.

page-break-after

Defines the page break behavior following an element's definition.

Syntax
page-break-after: behavior
Parameters
behavior

The page break behavior.

Constants

always, auto, avoid, left, right

Availability

Safari 1.2 and later.

Support Level

CSS 2.1.

page-break-before

Defines the page break behavior before an element's definition.

Syntax
page-break-before: behavior
Parameters
behavior

The page break behavior.

Constants

always, auto, avoid, left, right

Availability

Safari 1.2 and later.

Support Level

CSS 2.1.

page-break-inside

Defines the page break behavior within an element.

Syntax
page-break-inside: behavior
Parameters
behavior

The page break behavior.

Constants

auto, avoid

Availability

Safari 1.3 and later.

Support Level

CSS 2.1.

widows

Defines the minimum number of lines in a paragraph that must be left at the top of a page (after a page break).

Syntax
widows: number_of_lines
Parameters
number_of_lines

The number of lines.

Types Allowed

Integers

Availability

Safari 1.3 and later.

Support Level

CSS 2.1.

Colors and Backgrounds

background

Defines a variety of background properties within one declaration.

Syntax
background: background_color background_image background_repeat background_attachment background_position;
Parameters
background_color

The background color.

background_image

The file path of the background image.

background_repeat

The repeating behavior of the background image.

background_attachment

If fixed, the background image does not move when the page scrolls; if scroll, the image moves when the page scrolls.

background_position

The position of the background image.

Discussion

As with most composite properties, all arguments are optional.

Support Level

CSS 2.1.

background-attachment

Defines the scrolling or fixed nature of the page background.

Syntax
background-attachment: behavior
Parameters
background_attachment

If fixed, the background image does not move when the page scrolls; if scroll, the image moves when the page scrolls.

Constants

scroll, fixed

Support Level

CSS 2.1.

background-color

Defines an element’s background color.

Syntax
background-color: color
Parameters
color

The background color.

Constants
currentcolor

The value of the element’s color property.

-webkit-activelink

The default color of a hyperlink that is being clicked.

-webkit-focus-ring-color

The color that surrounds a UI element, such as a text field, that has focus.

-webkit-link

The default color of a hyperlink that has been visited.

-webkit-text

The default text color.

activeborder, activecaption, appworkspace, aqua, background, black, blue, buttonface, buttonhighlight, buttonshadow, buttontext, captiontext, fuchsia, gray, graytext, green, grey, highlight, highlighttext, inactiveborder, inactivecaption, inactivecaptiontext, infobackground, infotext, lime, maroon, match, menu, menutext, navy, olive, orange, purple, red, scrollbar, silver, teal, threeddarkshadow, threedface, threedhighlight, threedlightshadow, threedshadow, transparent, white, window, windowframe, windowtext, yellow

Discussion

Changes to this property can be animated.

Support Level

CSS 2.1.

background-image

Defines an element’s background image.

Syntax
background-image: value
background-image: function
Parameters
value

The file path of the image.

function

A function that procedurally generates an image, such as gradient.

Support Level

CSS 2.1.

background-position

Defines the origin of a background image.

Syntax
background-position: xpos
background-position: xpos ypos
Parameters
xpos

The x-coordinate of the origin of the background image.

ypos

The y-coordinate of the origin of the background image.

Discussion

Position can be specified in terms of pixels or percentages of the viewport width or using the keywords top, left, center, right, or bottom.

Changes to this property can be animated in Safari 4.0 and later.

Support Level

CSS 2.1.

background-position-x

Defines the x-coordinate of the origin of a background image.

Syntax
background-position-x: value
Parameters
value

The x-coordinate of the origin of the background image.

Support Level

Apple extension.

background-position-y

Defines the y-coordinate of the origin of a background image.

Syntax
background-position-y: value
Parameters
value

The y-coordinate of the origin of the background image.

Support Level

Apple extension.

background-repeat

Defines the repeating qualities of the background image.

Syntax
background-repeat: value
Parameters
value

The repeating behavior of the background image.

Discussion

This property controls whether tiling of an element’s background image should occur in the x direction, the y direction, both, or neither.

Support Level

CSS 2.1.

color

Defines the color of the text of an element.

Syntax
color: value
Parameters
value

The color. Colors can be specified with a constants, an RGB value, or a hexadecimal value.

Constants
-webkit-activelink

The default color of a hyperlink that is being clicked.

-webkit-focus-ring-color

The color that surrounds a UI element, such as a text field, that has focus.

-webkit-link

The default color of a hyperlink that has been visited.

-webkit-text

The default text color.

activeborder, activecaption, appworkspace, aqua, background, black, blue, buttonface, buttonhighlight, buttonshadow, buttontext, captiontext, fuchsia, gray, graytext, green, grey, highlight, highlighttext, inactiveborder, inactivecaption, inactivecaptiontext, infobackground, infotext, lime, maroon, match, menu, menutext, navy, olive, orange, purple, red, scrollbar, silver, teal, threeddarkshadow, threedface, threedhighlight, threedlightshadow, threedshadow, transparent, white, window, windowframe, windowtext, yellow

Discussion

Changes to this property can be animated.

Support Level

CSS 2.1.

-webkit-background-clip

Specifies the clipping behavior of the background of a box.

Syntax
-webkit-background-clip: behavior
Parameters
behavior

The clipping behavior of the background.

Constants
border

The background clips to the border of the box.

content

The background clips to the content of the box.

padding

The background clips to the padding of the box.

text

The background clips to the text of the box.

Available in Safari 4.0 and later.

Availability

Available in Safari 3.0 and later.

Available in iOS 1.0 and later.

Support Level

Experimental CSS 3.

-webkit-background-composite

Sets a compositing style for background images and colors.

Syntax
-webkit-background-composite: compositing_style
Parameters
compositing_style

The compositing style of the background.

Discussion

The default value is border, which means that the background extends into the border area. Specifying a value of padding limits the background so that it extends only into the padding area enclosed by the border.

Availability

Available in Safari 3.0 and later.

Available in iOS 1.0 and later.

Support Level

Under development.

-webkit-background-origin

Determines where the background-position property is anchored.

Syntax
-webkit-background-origin: origin
Parameters
origin

The origin of the background position.

Discussion

The background position can be anchored at the upper-left corner of the border, the upper-left corner of the padding area inside the border, or the upper-left corner of the content inside the padding area.

Availability

Available in Safari 3.0 and later.

Available in iOS 1.0 and later.

Support Level

Experimental CSS 3.

-webkit-background-size

Overrides the size of a background image.

Syntax
-webkit-background-size: length
-webkit-background-size: length_x length_y
Parameters
length

The width and height of the background image.

length_x

The width of the background image.

length_y

The height of the background image.

Discussion

Changes to this property can be animated in Safari 4.0 and later.

Availability

Available in Safari 3.0 and later.

Available in iOS 1.0 and later.

Support Level

Experimental CSS 3.

Fonts

font

Defines a variety of properties for an element’s text font within one declaration.

Syntax
font: font_style font_variant font_weight font_size / line_height
        font_family
font: ui_style
Parameters
font_style

The style of the font.

font_variant

The variant of the font.

font_weight

The weight, or boldness, of the font.

font_size

The size of the font.

line_height

The distance between lines.

font_family

The family of the font.

ui_style

The user interface style to replicate.

Constants
-webkit-control

The style of the text of a standard size UI element, such as a button.

-webkit-mini-control

The style of the text of a miniature size UI element, such as a button.

-webkit-small-control

The style of the text of a small size UI element, such as a button.

caption, icon, menu, message-box, small-caption, status-bar

Discussion

In addition to declaring a font style explicitly by characteristics, you can also specify a user interface style using constants such as caption. These constants represent the default font style for the specified user interface element, and as such, their specific values are dependent on the browser, the operating system, and user configuration options.

Using the font property resets all related font properties that are not explicitly specified.

Support Level

CSS 2.1.

font-family

Defines a list of fonts for element styling or downloadable font definitions.

Syntax
font-family: family [, ...]
Parameters
family

The family of the font.

Discussion

The font-family property has two different meanings, depending on context.

In the context of an element style, it defines a font to use for text within an element. Because not all computers have the same fonts available, this property to specify multiple acceptable fonts in descending order of preference. In addition, contants such as serif or sans-serif provide generic fallback fonts in case a browser does not have any of the listed fonts available.

In the context of a downloadable font definition, this property provides the name of the font that the font definition describes. In this form, you may specify multiple family names for the font, but generally only a single family name (optionally, specify that it should match against generic font names like serif).

For more information about downloadable font definitions, see “@font-face.”

Availability

Available in Safari 1.0 and later. Downloadable fonts supported in Safari 3.1 and later.

Available in iOS 1.0 and later.

Support Level

CSS 2.1.

font-size

Defines the font size for the text in an element or in a downloadable font definition.

Syntax
font-size: value
Parameters
value

The size of the font.

Types Allowed

Numbers as a percentage, length units

Constants

large, larger, medium, small, smaller, -webkit-xxx-large, x-large, x-small, xx-large, xx-small

Discussion

Changes to this property can be animated in Safari 4.0 and later. For more information about downloadable font definitions, see “@font-face.”

Availability

Available in Safari 1.0 and later. Downloadable fonts supported in Safari 3.1 and later.

Available in iOS 1.0 and later.

Support Level

CSS 2.1.

font-style

Defines the font style for the text in an element or a downloadable font definition.

Syntax
font-style: value
Parameters
value

The style of the font.

Constants

italic, normal, oblique

Availability

Available in Safari 1.0 and later. Downloadable fonts supported in Safari 3.1 and later.

Available in iOS 1.0 and later.

Support Level

CSS 2.1.

font-variant

Defines special font properties for the text in an element or for a downloadable font definition.

Syntax
font-variant: value
Parameters
value

The variant of the font.

Constants

normal, small-caps

Discussion

For more information about downloadable font definitions, see “@font-face.”

Availability

Available in Safari 1.0 and later. (The value small-caps is not supported.) Downloadable fonts supported in Safari 3.1 and later.

Available in iOS 1.0 and later.

Support Level

CSS 2.1.

font-weight

Defines the font weight of the text in an element or for a downloadable font definition.

Syntax
font-weight: value
Parameters
value

The weight, or boldness, of the font.

Types Allowed

Integers, nonnegative values

Constants

100, 200, 300, 400, 500, 600, 700, 800, 900, bold, bolder, lighter, normal

Discussion

For more information about downloadable font definitions, see “@font-face.”

Availability

Available in Safari 1.0 and later. Downloadable fonts supported in Safari 3.1 and later.

Available in iOS 1.0 and later.

Support Level

CSS 2.1.

src

Provides a list of locations for a downloadable font definition.

Syntax
src: local("Times New Roman"),
    URL(http://...) format("truetype"),
    URL(http://...), ...
Discussion

This property takes a comma-delimited list of font locations which may be locally installed font family names or HTTP URLs.

For more information about downloadable font definitions, see “@font-face.”

Availability

Available in Safari 3.1 and later.

Support Level

CSS 3.

unicode-range

Describes the unicode characters supported by a downloadable font definition.

Syntax
unicode-range: range [, ...];
unicode-range: start_character-end_character [, ...];
Parameters
range

The range of supported characters.

start_character

The first character in a range of supported characters.

end_character

The last character in a range of supported characters.

Discussion

This property takes a comma-delimited list of Unicode character ranges. There are two supported formats: singleton ranges and pair ranges.

A singleton range is in the form U+xxxx where xxxx is a hexadecimal number. For example, the range U+2150 indicates that Unicode character 0x2150 is supported. Leading zeroes may be omitted, so U+300 is the same as U+0300. The following snippet shows a singleton range: unicode-range: U+2150;

A singleton range may also contain wildcards in the form of a question-mark character. For example, U+36?? contains two wildcard characters. This range matches any value in which the first two digits are 36, without regard to the value for the last two digits. The following snippet shows a wildcard range that represents the Unicode characters 0x2160 through 0x216f, inclusive: unicode-range: U+216?;

A pair range is in the form of a hyphen-separated pair of hexadecimal values in the form U+xxxx-yyyy where xxxx and yyyy are hexadecimal numbers. For example, the following pair range represents the Unicode characters from 0x2164 through 0x2156, inclusive: unicode-range: U+2154-2156;

For more information about downloadable font definitions, see “@font-face.”

Availability

Available in Safari 3.1 and later.

Support Level

CSS 3.

Text

letter-spacing

Defines the horizontal interletter spacing of characters within the text of an element.

Syntax
letter-spacing: length
Parameters
length

The size of the character spacing.

Types Allowed

Length units

Constants

normal

Discussion

Changes to this property can be animated.

Support Level

CSS 2.1.

text-align

Defines the alignment for inline content within an element.

Syntax
text-align: position
Parameters
position

The inline content alignment.

Constants
-webkit-auto

Text is aligned to the default alignment.

-webkit-center

Text is aligned to the center.

-webkit-left

Text is aligned to the left.

-webkit-right

Text is aligned to the right.

center, end, justify, left, right, start

Support Level

CSS 2.1.

text-decoration

Defines special styling for text, such as underlines.

Syntax
text-decoration: style
Parameters
style

The type of decoration.

Constants

line-through, none, overline, underline

Support Level

CSS 2.1.

text-indent

Defines the amount to indent the first line of text within an element.

Syntax
text-indent: length;
Parameters
length

The amount to indent.

Types Allowed

Numbers as a percentage, length units

Support Level

CSS 2.1.

text-overflow

Controls overflow of non-wrapped text.

Syntax
text-overflow: behavior;
Parameters
behavior

The overflow behavior.

Constants

clip, ellipsis

Discussion

This property controls how Safari displays text that exceeds the specified width of the enclosing paragraph if the “overflow” property is set to hidden and style rules or nowrap tags prevent the text from wrapping (or if a single word is too long to fit by itself).

Support Level

CSS 3.

text-shadow

Defines a variety of properties for an element’s text shadow within one declaration.

Syntax
text-shadow: color x_offset y_offset blur_radius
Parameters
color

The color of the shadow.

x_offset

The horizontal offset of the shadow.

y_offset

The vertical offset of the shadow.

blur_radius

The blur radius of the shadow.

Constants

none

Discussion

Although the CSS specification allows it, multiple shadows are not supported in Safari. Changes to this property can be animated.

Support Level

CSS 2.1.

text-transform

Defines a capitalization transformation for the text in an element.

Syntax
text-transform: transformation
Parameters
transformation

The capitalization transformation.

Constants

capitalize, lowercase, none, uppercase

Support Level

CSS 2.1.

white-space

Defines how whitespace characters in an element are handled onscreen.

Syntax
white-space: policy
Parameters
policy

The policy for displaying whitespace in the element.

Constants

normal, nowrap, pre, pre-line, pre-wrap

Support Level

CSS 2.1.

word-break

Specifies the level of strictness when breaking lines of text in ideographic languages such as Chinese, Japanese, and Korean.

Syntax
word-break: strictness
Parameters
strictness

The level of strictness.

Constants

break-all, break-word, normal

Availability

Available in Safari 3.0 and later.

Available in iOS 2.0 and later.

Support Level

Stable CSS 3.

word-spacing

Defines the amount of space between words.

Syntax
word-spacing: length
Parameters
length

The amount of spacing.

Types Allowed

Length units

Constants

normal

Discussion

Changes to this property can be animated.

Support Level

CSS 2.1.

word-wrap

Specifies word-splitting behavior for wrapping lines that are too long for the enclosing box and contain no spaces.

Syntax
word-wrap: behavior
Parameters
behavior

The wrapping behavior.

Constants

break-word, normal

Availability

Available in Safari 2.0 and later.

Available in iOS 1.0 and later.

Support Level

Stable CSS 3.

-webkit-marquee

Defines properties for showing content as though displayed on an electronic marquee sign.

Syntax
-webkit-marquee: direction increment repetition style speed
Parameters
direction

The direction of the marquee.

increment

The distance the marquee moves in each increment

repetition

The number of times the marquee repeats.

style

The style of the marquee’s motion.

speed

The scroll or slide speed of the marquee.

Subproperties
  • -webkit-marquee-direction

  • -webkit-marquee-increment

  • -webkit-marquee-repetition

  • -webkit-marquee-speed

  • -webkit-marquee-style

Availability

Available in Safari 3.0 and later. (Called -khtml-marquee in Safari 2.0.)

Available in iOS 1.0.

Support Level

Under development.

-webkit-marquee-direction

Specifies the direction of motion for a marquee box.

Syntax
-webkit-marquee-direction: direction
Parameters
direction

The direction of the marquee.

Constants
ahead

The marquee moves from bottom to top.

auto

The marquee moves in the default direction.

backwards

The marquee moves from right to left.

down

The marquee moves from bottom to top.

forwards

The marquee moves from left to right.

left

The marquee moves from right to left.

reverse

The marquee moves from top to bottom.

right

The marquee moves from left to right.

up

The marquee moves from bottom to top.

Availability

Available in Safari 3.0 and later. (Called -khtml-marquee-direction in Safari 2.0.)

Available in iOS 1.0 and later.

Support Level

Under development.

-webkit-marquee-increment

Defines the distance the marquee moves in each increment.

Syntax
-webkit-marquee-increment: distance
Parameters
distance

The distance the marquee moves in each increment

Types Allowed

Numbers as a percentage, length units

Constants
large

The marquee moves a large amount in each increment.

medium

The marquee moves a medium amount in each increment.

small

The marquee moves a small amount in each increment.

Availability

Available in Safari 3.0 and later. (Called -khtml-marquee-increment in Safari 2.0.)

Available in iOS 1.0 and later.

Support Level

Under development.

-webkit-marquee-repetition

Specifies the number of times a marquee box repeats (or infinite).

Syntax
-webkit-marquee-repetition: iterations
Parameters
iterations

The number of times the marquee repeats.

Types Allowed

Integers, nonnegative values

Constants
infinite

The marquee repeats infinitely.

Availability

Available in Safari 3.0 and later. (Called -khtml-marquee-repetition in Safari 2.0.)

Available in iOS 1.0.

Support Level

Under development.

-webkit-marquee-speed

Defines the scroll or slide speed of a marquee box.

Syntax
-webkit-marquee-speed: speed
-webkit-marquee-speed: distance / time
Parameters
speed

The scroll or slide speed of the marquee.

distance

The distance term in the speed equation.

time

The time term in the speed equation.

Types Allowed

Integers, time units, nonnegative values

Constants
fast

The marquee moves at a fast speed.

normal

The marquee moves at a normal speed.

slow

The marquee moves at a slow speed.

Discussion

This property can either take one speed parameter (slow, for example) or a measure of distance and a measure of time separated by a slash (/).

Availability

Available in Safari 3.0 and later. (Called -khtml-marquee-speed in Safari 2.0.)

Available in iOS 1.0 and later.

Support Level

Under development.

-webkit-marquee-style

Specifies the style of marquee motion.

Syntax
-webkit-marquee-style: style
Parameters
style

The style of the marquee’s motion.

Constants
alternate

The marquee shifts back and forth.

none

The marquee does not move.

scroll

The marquee loops in its specified direction.

slide

The marquee moves in its specified direction, but stops either when the entirety of its content has been displayed or the content reaches the opposite border of its box, whichever comes second.

Discussion

The values scroll and slide both cause the content to start outside the box and move into the box, but if the value scroll is specified, the content stops moving once the last content is visible. The value alternate causes the content to shift back and forth within the box in the specified direction.

Availability

Available in Safari 3.0 and later. (Called -khtml-marquee-style in Safari 2.0.)

Available in iOS 1.0 and later.

Support Level

Under development.

-webkit-text-fill-color

Specifies a fill color for text.

Syntax
-webkit-text-fill-color: color
Parameters
color

The fill color. Colors can be specified with a constant, an RGB value, or a hexadecimal value.

Constants
currentcolor

The value of the element’s color property.

-webkit-activelink

The default color of a hyperlink that is being clicked.

-webkit-focus-ring-color

The color that surrounds a UI element, such as a text field, that has focus.

-webkit-link

The default color of a hyperlink that has been visited.

-webkit-text

The default text color.

activeborder, activecaption, appworkspace, aqua, background, black, blue, buttonface, buttonhighlight, buttonshadow, buttontext, captiontext, fuchsia, gray, graytext, green, grey, highlight, highlighttext, inactiveborder, inactivecaption, inactivecaptiontext, infobackground, infotext, lime, maroon, match, menu, menutext, navy, olive, orange, purple, red, scrollbar, silver, teal, threeddarkshadow, threedface, threedhighlight, threedlightshadow, threedshadow, transparent, white, window, windowframe, windowtext, yellow

Discussion

If not specified, the color specified by the color property is used. -webkit-fill-color is commonly used in combination with -webkit-text-stroke. Changes to this property can be animated.

Availability

Available in Safari 3.0 and later.

Available in iOS 2.0 and later.

Support Level

Apple extension.

-webkit-text-security

Specifies the shape to use in place of letters in a password input field.

Syntax
-webkit-text-security: shape
Parameters
shape

The shape to use in place of letters.

Constants
circle

A circle shape.

disc

A disc shape.

none

No shape is used.

square

A square shape.

Availability

Available in Safari 3.0 and later.

Available in iOS 1.0 and later.

Support Level

Apple extension.

-webkit-text-size-adjust

Specifies a size adjustment for displaying text content in Safari on iOS.

Syntax
-webkit-text-size-adjust: percentage
Parameters
percentage

The size at which to display text in Safari on iOS.

Constants
auto

The text size is automatically adjusted for Safari on iOS.

none

The text size is not adjusted.

Availability

Available in iOS 1.0 and later.

Support Level

Apple extension—Safari on iOS only.

-webkit-text-stroke

Specifies the width and color of the outline (stroke) of text.

Syntax
-webkit-text-stroke: width color
Parameters
width

The width of the stroke.

color

The color of the stroke.

Subproperties
  • -webkit-text-stroke-color

  • -webkit-text-stroke-width

Discussion

This property is commonly used in combination with -webkit-text-fill-color.

Availability

Available in Safari 3.0 and later.

Available in iOS 2.0 and later.

Support Level

Apple extension.

-webkit-text-stroke-color

Specifies the color of the outline (stroke) of text.

Syntax
-webkit-text-stroke-color: color
Parameters
color

The color of the stroke.

Constants
currentcolor

The value of the element’s color property.

-webkit-activelink

The default color of a hyperlink that is being clicked.

-webkit-focus-ring-color

The color that surrounds a UI element, such as a text field, that has focus.

-webkit-link

The default color of a hyperlink that has been visited.

-webkit-text

The default text color.

activeborder, activecaption, appworkspace, aqua, background, black, blue, buttonface, buttonhighlight, buttonshadow, buttontext, captiontext, fuchsia, gray, graytext, green, grey, highlight, highlighttext, inactiveborder, inactivecaption, inactivecaptiontext, infobackground, infotext, lime, maroon, match, menu, menutext, navy, olive, orange, purple, red, scrollbar, silver, teal, threeddarkshadow, threedface, threedhighlight, threedlightshadow, threedshadow, transparent, white, window, windowframe, windowtext, yellow

Discussion

If not specified, the color specified by the color property is used. -webkit-text-stroke-color is commonly used in combination with -webkit-text-fill-color. Changes to this property can be animated.

Availability

Available in Safari 3.0 and later.

Available in iOS 2.0 and later.

Support Level

Apple extension.

-webkit-text-stroke-width

Specifies the width for the text outline.

Syntax
-webkit-text-stroke-width: width
Parameters
width

The width of the stroke.

Types Allowed

Length units

Constants
medium

A medium stroke.

thick

A thick stroke.

thin

A thin stroke.

Discussion

This property is significant only in combination with -webkit-text-stroke-color.

Availability

Available in Safari 3.0 and later.

Available in iOS 2.0 and later.

Support Level

Apple extension.

-webkit-line-break

Specifies line-breaking rules for CJK (Chinese, Japanese, and Korean) text.

Syntax
-webkit-line-break: setting
Parameters
setting

The line-breaking setting.

Constants
after-white-space

The line breaks after white space.

normal

A standard line-breaking rule.

Availability

Available in Safari 3.0 and later. (Called -khtml-line-break in Safari 2.0.)

Available in iOS 1.0 and later.

Support Level

Apple extension.

-webkit-appearance

Changes the appearance of buttons and other controls to resemble native controls.

Syntax
-webkit-appearance: appearance
Parameters
appearance

The appearance of the control.

Constants
caps-lock-indicator

The indicator that appears in a password field when Caps Lock is active.

Available in Safari 4.0 and later.

Available in iOS 2.0 and later

button, button-bevel, caret, checkbox, default-button, listbox, listitem, media-fullscreen-button, media-mute-button, media-play-button, media-seek-back-button, media-seek-forward-button, media-slider, media-sliderthumb, menulist, menulist-button, menulist-text, menulist-textfield, none, push-button, radio, searchfield, searchfield-cancel-button, searchfield-decoration, searchfield-results-button, searchfield-results-decoration, slider-horizontal, slider-vertical, sliderthumb-horizontal, sliderthumb-vertical, square-button, textarea, textfield

The following constants are unsupported in Safari 4.0:

scrollbarbutton-down, scrollbarbutton-left, scrollbarbutton-right, scrollbarbutton-up, scrollbargripper-horizontal, scrollbargripper-vertical, scrollbarthumb-horizontal, scrollbarthumb-vertical, scrollbartrack-horizontal, scrollbartrack-vertical

Availability

Available in Safari 3.0 and later.

Available in iOS 1.0 and later.

Support Level

Experimental CSS 3.

-webkit-nbsp-mode

Defines the behavior of nonbreaking spaces within text.

Syntax
-webkit-nbsp-mode: behavior;
Parameters
behavior

The behavior of nonbreaking spaces.

Constants
normal

Nonbreaking spaces are treated as usual.

space

Nonbreaking spaces are treated like standard spaces.

Availability

Available in Safari 3.0 and later. (Called -khtml-nbsp-mode in Safari 2.0.)

Available in iOS 1.0 and later.

Support Level

Apple extension.

-webkit-rtl-ordering

Overrides ordering defaults for right-to-left content.

Syntax
-webkit-rtl-ordering: order;
Parameters
order

The order of the content.

Constants
logical

Raw content is in mixed order (requiring a bidirectional renderer).

visual

Right-to-left content is encoded in reverse order so an entire line of text can be rendered from left to right in a unidirectional fashion.

Discussion

The distinction between these two character orders is normally handled automatically as a side effect of character set. This property allows you to override whether the browser should treat the content as being in logical or visual order.

Availability

Available in Safari 3.0 and later.

Available in iOS 2.0 and later.

Support Level

Apple extension.

-webkit-user-drag

Specifies that an entire element should be draggable instead of its contents.

Syntax
-webkit-user-drag: behavior;
Parameters
behavior

The dragging behavior of the element.

Constants
auto

The default dragging behavior is used.

element

The entire element is draggable instead of its contents.

none

The element cannot be dragged at all.

Availability

Available in Safari 3.0 and later. (Called -khtml-user-drag in Safari 2.0.)

Support Level

Apple extension.

-webkit-user-modify

Determines whether a user can edit the content of an element.

Syntax
-webkit-user-modify: policy;
Parameters
policy

The user modification policy.

Constants
read-only

The content is read-only.

read-write

The content can be read and written.

read-write-plaintext-only

The content can be read and written, but any rich formatting of pasted text is lost.

Discussion

This is closely related to the contentEditable attribute.

Availability

Available in Safari 3.0 and later. (Called -khtml-user-modify in Safari 2.0.)

Availabile in iOS 5.0 and later.

Support Level

Apple extension.

-webkit-user-select

Determines whether a user can select the content of an element.

Syntax
-webkit-user-select: policy;
Parameters
policy

The user selection policy.

Constants
auto

The user can select content in the element.

none

The user cannot select any content.

text

The user can select text in the element.

Availability

Available in Safari 3.0 and later. (Called -khtml-user-select in Safari 2.0.)

Available in iOS 3.0 and later.

Support Level

Apple extension.

Tables

border-collapse

Defines the model of an element’s border.

Syntax
border-collapse: behavior;
Constants

collapse, separate

Support Level

CSS 2.1.

border-spacing

Defines the spacing between an element’s border and the content within.

Syntax
border-spacing: length;
Parameters
length

The size of the spacing.

Subproperties
  • -webkit-border-horizontal-spacing

  • -webkit-border-vertical-spacing

Support Level

CSS 2.1.

caption-side

Defines the side of a table on which its caption appears.

Syntax
caption-side: side;
Parameters
side

The side of the table that will have a caption.

Constants

bottom, left, right, top

Support Level

CSS 2.1.

empty-cells

Sets the border behavior for cells with no content.

Syntax
empty-cells: behavior;
Parameters
behavior

The behavior for cells with no content.

Constants

hide, show

Support Level

CSS 2.1.

table-layout

Specifies whether to use automatic or fixed table layout.

Syntax
table-layout: behavior;
Parameters
behavior

If auto, layout is determined by all cells in the table; if fixed, layout is determined by the first row of content only.

Constants

auto, fixed

Discussion

Automatic table layout, specified by the value auto, is the default table layout behavior. In this mode, the table layout is calculated based on the contents of every cell in every row of the table.

Fixed table layout, specified by the value fixed, is a faster (but more restrictive) layout behavior. In this layout mode, the layout of the table is calculated based only on the first row of tabular content (not including any heading rows). This mode allows the layout to be calculated much earlier in the page load process and greatly simplifies the calculations, but can cause content in later rows to overflow the table’s boundaries.

Support Level

CSS 2.1.

-webkit-border-horizontal-spacing

Defines the spacing between the horizontal portion of an element’s border and the content within.

Syntax
-webkit-border-horizontal-spacing: value;
Parameters
value

The amount of horizontal spacing.

Types Allowed

Length units, nonnegative values

Discussion

Equivalent to the horizontal portion of the border-spacing property. Changes to this property can be animated.

Availability

Available in Safari 3.0 and later. (Called -khtml-border-horizontal-spacing in Safari 2.0.)

Available in iOS 1.0 and later.

Support Level

Apple extension.

-webkit-border-vertical-spacing

Defines the spacing between the vertical portion of an element’s border and the content within.

Syntax
-webkit-border-vertical-spacing: value;
Parameters
value

The amount of vertical spacing.

Types Allowed

Length units, nonnegative values

Discussion

Equivalent to the vertical portion of the border-spacing property. Changes to this property can be animated.

Availability

Available in Safari 3.0 and later. (Called -khtml-border-vertical-spacing in Safari 2.0.)

Available in iOS 1.0 and later.

Support Level

Apple extension.

-webkit-column-break-after

Determines whether a column break can and should occur after an element in a multicolumn flow layout.

Syntax
-webkit-column-break-after: policy;
Parameters
policy

The column break policy.

Constants
always

A column break is always inserted after the element.

auto

A right column break is inserted after the element where appropriate.

avoid

Column breaks are avoided after the element.

left

A left column break is inserted after the element.

right

A right column break is inserted after the element.

Availability

Available in Safari 3.0 and later.

Available in iOS 2.0 and later.

Support Level

Under development.

-webkit-column-break-before

Determines whether a column break can and should occur before an element in a multicolumn flow layout.

Syntax
-webkit-column-break-before: policy;
Parameters
policy

The column break policy.

Constants
always

A column break is always inserted before the element.

auto

A right column break is inserted before the element where appropriate.

avoid

Column breaks are avoided before the element.

left

A left column break is inserted before the element.

right

A right column break is inserted before the element.

Availability

Available in Safari 3.0 and later.

Available in iOS 2.0 and later.

Support Level

Under development.

-webkit-column-break-inside

Determines whether a column break should be avoided within the bounds of an element in a multicolumn flow layout.

Syntax
-webkit-column-break-inside: policy;
Parameters
policy

The column break policy.

Constants
auto

A right column break is inserted within the element where appropriate.

avoid

Column breaks are avoided within the element.

Availability

Available in Safari 3.0 and later.

Available in iOS 2.0 and later.

Support Level

Under development.

-webkit-column-count

Specifies the number of columns desired in a multicolumn flow.

Syntax
-webkit-column-count: number_of_columns;
Parameters
number_of_columns

The number of columns in the multicolumn flow.

Types Allowed

Integers, nonnegative values

Constants
auto

The element has one column.

Discussion

Changes to this property can be animated.

Availability

Available in Safari 3.0 and later.

Available in iOS 2.0 and later.

Support Level

Under development.

-webkit-column-gap

Specifies the space between columns in a multicolumn flow.

Syntax
-webkit-column-gap: width;
Parameters
width

The width of the gap.

Types Allowed

Length units

Constants
normal

Columns in the element have the normal gap width between them.

Discussion

Changes to this property can be animated.

Availability

Available in Safari 3.0 and later.

Available in iOS 2.0 and later.

Support Level

Under development.

-webkit-column-rule

Specifies the color, style, and width of the column rule.

Syntax
-webkit-column-rule: width style color;
Parameters
width

The width of the column rule.

style

The style of the column rule.

color

The color of the column rule.

Subproperties
  • -webkit-column-rule-color

  • -webkit-column-rule-style

  • -webkit-column-rule-width

Discussion

The column rule appears in the middle of the column gap in a multicolumn flow layout.

Availability

Available in Safari 3.0 and later.

Available in iOS 2.0 and later.

Support Level

Under development.

-webkit-column-rule-color

Specifies the color of the column rule.

Syntax
-webkit-column-rule-color: color;
Parameters
color

The color of the column rule.

Constants
currentcolor

The value of the element’s color property.

-webkit-activelink

The default color of a hyperlink that is being clicked.

-webkit-focus-ring-color

The color that surrounds a UI element, such as a text field, that has focus.

-webkit-link

The default color of a hyperlink that has been visited.

-webkit-text

The default text color.

activeborder, activecaption, appworkspace, aqua, background, black, blue, buttonface, buttonhighlight, buttonshadow, buttontext, captiontext, fuchsia, gray, graytext, green, grey, highlight, highlighttext, inactiveborder, inactivecaption, inactivecaptiontext, infobackground, infotext, lime, maroon, match, menu, menutext, navy, olive, orange, purple, red, scrollbar, silver, teal, threeddarkshadow, threedface, threedhighlight, threedlightshadow, threedshadow, transparent, white, window, windowframe, windowtext, yellow

Discussion

Changes to this property can be animated.

Availability

Available in Safari 3.0 and later.

Available in iOS 2.0 and later.

Support Level

Under development.

-webkit-column-rule-style

Specifies the style of the column rule.

Syntax
-webkit-column-rule-style: style;
Parameters
style

The style of the column rule.

Constants
dashed

The column rule has a dashed line style.

dotted

The column rule has a dotted line style.

double

The column rule has a double solid line style.

groove

The column rule has a grooved style.

hidden

The column rule is hidden.

inset

The column rule has an inset style.

none

The column rule has no style.

outset

The column rule has an outset style.

ridge

The column rule has a ridged style.

solid

The column rule has a solid line style.

Availability

Available in Safari 3.0 and later.

Available in iOS 2.0 and later.

Support Level

Under development.

-webkit-column-rule-width

Specifies the width of the column rule.

Syntax
-webkit-column-rule-width: width;
Parameters
width

The width of the column rule.

Types Allowed

Length units

Constants
medium

The column rule has a medium width.

thick

The column rule has a thick width.

thin

The column rule has a thin width.

Discussion

Changes to this property can be animated.

Availability

Available in Safari 3.0 and later.

Available in iOS 2.0 and later.

Support Level

Under development.

-webkit-column-width

Specifies the width of the column in a multicolumn flow.

Syntax
-webkit-column-width: width;
Parameters
width

The width of the column.

Types Allowed

Length units

Constants
auto

Columns in the element are of normal width.

Discussion

Changes to this property can be animated.

Availability

Available in Safari 3.0 and later.

Available in iOS 2.0 and later.

Support Level

Under development.

-webkit-columns

A composite property that specifies the width and number of columns in a multicolumn flow layout.

Syntax
-webkit-columns: width count
Parameters
width

The width of each column.

count

The number of columns.

Subproperties
  • -webkit-column-count

  • -webkit-column-width

Availability

Available in Safari 3.0 and later.

Available in iOS 2.0 and later.

Support Level

Under development.

User Interface

cursor

Defines the cursor to display onscreen when the pointer is over an element.

Syntax
cursor: style;
Parameters
style

The type of cursor.

Constants
-webkit-grab

An open hand cursor indicating the element can be grabbed.

-webkit-grabbing

A closed hand cursor indicating the element has been grabbed.

-webkit-zoom-in

A zoom-in cursor.

-webkit-zoom-out

A zoom-out cursor.

alias, all-scroll, auto, cell, col-resize, context-menu, copy, crosshair, default, e-resize, ew-resize, hand, help, move, n-resize, ne-resize, nesw-resize, no-drop, none, not-allowed, ns-resize, nw-resize, nwse-resize, pointer, progress, row-resize, s-resize, se-resize, sw-resize, text, vertical-text, w-resize, wait

Discussion

Although the CSS specification allows it, Safari does not support custom cursors.

Availability

Available in Safari 1.2 and later.

Support Level

CSS 2.1.

outline

Defines a variety of properties for an element’s outline (drawn outside the element’s border) within one declaration.

Syntax
outline: color style width;
Parameters
color

The color of the outline.

style

The style of the outline.

width

The width of the outline.

Subproperties
  • outline-color

  • outline-style

  • outline-width

Support Level

CSS 2.1.

outline-color

Defines the color of an element’s outline.

Syntax
outline-color: color;
Parameters
color

The color of the outline.

Constants
-webkit-focus-ring-color

The color that surrounds a UI element, such as a text field, that has focus.

invert

Discussion

Changes to this property can be animated.

Support Level

CSS 2.1.

outline-offset

Defines the offset of an element’s outline from its border.

Syntax
outline-offset: length;
Parameters
length

The size of the offset.

Types Allowed

Length units

Discussion

Changes to this property can be animated.

Support Level

CSS 2.1.

outline-style

Defines the style of an element’s outline.

Syntax
outline-style: value;
Parameters
value

The style of the outline.

Constants

auto

Support Level

CSS 2.1.

outline-width

Defines the width of an element's outline.

Syntax
outline-width: value;
Parameters
value

The width of the outline.

Types Allowed

Length units

Constants

medium, thick, thin

Discussion

Changes to this property can be animated.

Support Level

CSS 2.1.

pointer-events

Defines the parts of an element that responds to pointer events, such as a click, mouse over, or hover.

Syntax
pointer-events: value;
Parameters
value

The parts of the element that respond to pointer events.

Constants
auto

The entire element responds to pointer events.

none

The element does not respond to pointer events.

Discussion

Providing a value of none does not disable the Inspect Element option that appears when the element is Control-clicked, however the option may return the wrong element.

Availability

Available in Safari 4.0 and later.

Support Level

Apple extension.

-webkit-box-align

Specifies the alignment of nested elements within an outer flexible box element.

Syntax
-webkit-box-align: alignment;
Parameters
alignment

The alignment of nested elements.

Constants
baseline

Elements are aligned with the baseline of the box.

center

Elements are aligned with the center of the box.

end

Elements are aligned with the end of the box.

start

Elements are aligned with the start of the box.

stretch

Elements are stretched to fill the box.

Discussion

This property specifies the horizontal alignment if the box direction is vertical, and vice versa. This property applies only to flexible box layouts. For more information about flexible boxes, see http://www.w3.org/TR/css3-layout/.

Availability

Available in Safari 3.0 and later. (Called -khtml-box-align in Safari 1.1 through Safari 2.0.)

Available in iOS 1.0 and later.

Support Level

Under development.

-webkit-box-direction

Specifies the direction in which child elements of a flexible box element are laid out.

Syntax
-webkit-box-direction: layout_direction;
Parameters
layout_direction

The layout direction.

Constants
normal

Elements are laid out in the default direction.

reverse

Elements are laid out in the reverse direction.

Discussion

This applies only to flexible box layouts. For more information about flexible boxes, see http://www.w3.org/TR/css3-layout/.

Availability

Available in Safari 3.0 and later. (Called -khtml-box-direction in Safari 1.1 through Safari 2.0.)

Available in iOS 1.0 and later.

Support Level

Under development.

-webkit-box-flex

Specifies an element’s flexibility.

Syntax
-webkit-box-flex: flex_value;
Parameters
flex_value

The flexibility of the element.

Types Allowed

Floating-point numbers

Discussion

Flexible elements can stretch or shrink to fit the size of the bounding box of their parent element. The amount of stretching or shrinkage of an element is determined by its flex value relative to the flex values of other elements within the same parent element.

This property applies only to flexible box layouts. For more information about flexible boxes, see http://www.w3.org/TR/css3-layout/.

Availability

Available in Safari 3.0 and later. (Called -khtml-box-flex in Safari 1.1 through Safari 2.0.)

Available in iOS 1.0 and later.

Support Level

Under development.

-webkit-box-flex-group

Specifies groups of dynamically resizing elements that are adjusted to be the same size.

Syntax
-webkit-box-flex-group: group_number;
Parameters
group_number

The group number of the flexible element.

Types Allowed

Integers, nonnegative values

Discussion

During size adjustment of flex boxes, any boxes with the same group number are adjusted to be the same size.

This property applies only to flexible box layouts. For more information about flexible boxes, see http://www.w3.org/TR/css3-layout/.

Availability

Available in Safari 3.0 and later. (Called -khtml-box-flex-group in Safari 1.1 through Safari 2.0.)

Available in iOS 1.0 and later.

Support Level

Under development.

-webkit-box-lines

Specifies whether a flexible box should contain multiple lines of content.

Syntax
-webkit-box-lines: behavior;
Parameters
behavior

If multiple, the flexible box can contain multiple lines of content; if single, only one line is allowed.

Constants
multiple

The box can contain multiple lines of content.

single

The box can contain only one line of content.

Discussion

This property applies only to flexible box layouts. For more information about flexible boxes, see http://www.w3.org/TR/css3-layout/.

Availability

Available in Safari 3.0 and later. (Called -khtml-box-lines in Safari 1.1 through Safari 2.0.)

Available in iOS 1.0 and later.

Support Level

Under development.

-webkit-box-ordinal-group

Specifies a rough ordering of elements in a flexible box.

Syntax
-webkit-box-ordinal-group: group_number;
Parameters
group_number

The ordinal group number of the element.

Types Allowed

Integers, nonnegative values

Discussion

Elements with lower ordinal group values are displayed first.

This property applies only to flexible box layouts. For more information about flexible boxes, see http://www.w3.org/TR/css3-layout/.

Availability

Available in Safari 3.0 and later. (Called -khtml-box-ordinal-group in Safari 1.1 through Safari 2.0.)

Available in iOS 1.0 and later.

Support Level

Under development.

-webkit-box-orient

Specifies the layout of elements nested within a flexible box element.

Syntax
-webkit-box-orient: orientation;
Parameters
orientation

The orientation of elements nested in the flexible box.

Constants
block-axis

Elements are oriented along the box’s axis.

horizontal

Elements are oriented horizontally.

inline-axis

Elements are oriented along the inline axis.

vertical

Elements are oriented vertically.

Discussion

This property applies only to flexible box layouts. For more information about flexible boxes, see http://www.w3.org/TR/css3-layout/.

Availability

Available in Safari 3.0 and later. (Called -khtml-box-orient in Safari 1.1 through Safari 2.0.)

Available in iOS 1.0 and later.

Support Level

Under development.

-webkit-box-pack

Specifies alignment of child elements within the current element in the direction of orientation.

Syntax
-webkit-box-pack: alignment;
Parameters
alignment

The alignment of child elements.

Constants
center

Child elements are aligned to the center of the element.

end

Child elements are aligned to the end of the element.

justify

Child elements are justified with both the start and end of the element.

start

Child elements are aligned to the start of the element.

Discussion

For elements whose children are aligned horizontally, a packing value of start indicates left alignment with extra space towards the right side, a value of end indicates right alignment with extra space to the left, a value of center indicates center alignment with extra space split evenly on either side, and a value of justify indicates that the outer elements should be aligned on the left and right, with space added evenly between the elements.

Similarly, for elements whose children are aligned vertically, a value of start indicates that the elements should be aligned to the top, a value of end indicates that the elements should be aligned to the bottom, and so on.

This property is similar to “-webkit-box-align,” which specifies alignment in the opposite direction from the direction of orientation.

This property applies only to flexible box layouts. For more information about flexible boxes, see http://www.w3.org/TR/css3-layout/.

Availability

Available in Safari 3.0 and later. (Called -khtml-box-pack in Safari 1.1 through Safari 2.0.)

Available in iOS 1.0 and later.

Support Level

Under development.

-webkit-dashboard-region

Specifies the behavior of regions in a Dashboard widget.

Syntax
-webkit-dashboard-region:
            dashboard-region( ... )
            [...]
Constants
none

No behavior is specified.

Discussion

This property is described in more detail in “Declaring Control Regions” in Dashboard Programming Topics.

Availability

Available in Safari 3.0 and later. (Called -apple-dashboard-region in Safari 2.0.)

Support Level

Apple extension—Dashboard only.

-webkit-overflow-scrolling

Specifies whether to use native-style scrolling in an overflow:scroll element.

Syntax
-webkit-overflow-scrolling: value
Parameters
value

The style of scrolling.

Constants
auto

One finger scrolling without momentum.

touch

Native-style scrolling. Specifying this style has the effect of creating a stacking context (like opacity, masks, and transforms).

Discussion

The default value is auto.

Availability

Available in iOS 5.0 and later.

Support Level

Under development.

-webkit-tap-highlight-color

Overrides the highlight color shown when the user taps a link or a JavaScript clickable element in Safari on iOS.

Syntax
-webkit-tap-highlight-color: color;
Parameters
color

The tapped link color.

Discussion

This property obeys the alpha value, if specified. If you don’t specify an alpha value, Safari on iOS applies a default alpha value to the color. To disable tap highlighting, set the alpha value to 0 (invisible). If you set the alpha value to 1.0 (opaque), the element is not visible when tapped.

Availability

Available in iOS 1.1.1 and later.

Support Level

Apple extension—Safari on iOS only.

-webkit-touch-callout

Disables the default callout shown when you touch and hold a touch target.

Syntax
-webkit-touch-callout: behavior;
Parameters
behavior

The touch callout behavior.

Discussion

On iOS, when you touch and hold a touch target such as a link, Safari displays a callout containing information about the link. This property allows you to disable that callout.

The current allowable values are none and inherit.

Availability

Available in iOS 2.0 and later.

Support Level

Apple extension—Safari on iOS only.

Additional Unsupported Properties

WebKit provides partial support for a number of properties that are not supported for developer use. This list may include:

Because these properties are unsupported, they are not documented in detail. However, they are listed here so that if you find them in the source code, in test cases, and so on, you will be able to determine their status.

WebKit-Specific Unsupported Properties

  • -webkit-border-fit

  • -webkit-font-size-delta

  • -webkit-highlight

  • -webkit-line-clamp

  • -webkit-match-nearest-mail-blockquote-color

  • -webkit-text-decorations-in-effect

  • -webkit-transition-repeat-count

Unsupported Properties from the CSS Specification

  • font-size-adjust—Describes the font aspect ratio to preserve proportionality in the event of font substitution. Unsupported CSS 2 property; removed in CSS 2.1; reintroduced in CSS 3.

  • font-stretch—Selects a normal, condensed, or extended variant of a font in an element or describes availability of these variants in a font definition. Declared in CSS 2.1/CSS 3.

  • marker-offset—Sets the offset of a marker (a bullet in a bulleted list, for example). Unsupported CSS 2 property; removed in CSS 2.1.

  • marks—Sets what type of crop marks to use on paged media. Unsupported CSS 2 property; removed in CSS 2.1.

  • page—Used for named page support. Unsupported CSS 2 property; removed in CSS 2.1.

  • quotes—Sets the quotation mark characters used for nested <q> tags.

  • size—Sets page dimensions for paged media. Unsupported CSS 2 property; removed in CSS 2.1.

  • speak-header—Sets whether a browser should speak the contents of the corresponding table heading cell before speaking the contents of each cell. Unsupported CSS 2 aural media property. Aural media deprecated in CSS 2.1. Property reintroduced in CSS 3

  • text-line-through—Composite property describing overstrike color, style, and mode. Declared in CSS 3.

  • text-line-through-color—Describes color for overstrike. Declared in CSS 3.

  • text-line-through-mode—Describes the mode for overstrike. Declared in CSS 3.

  • text-line-through-style—Describes the style for overstrike. Declared in CSS 3.

  • text-line-through-width—Describes the width for overstrike. Declared in CSS 3.

  • text-overline—Composite property describing overline color, style, mode, and width(like underline, but above the text). Declared in CSS 3.

  • text-overline-color—Describes the color of overline (like underline, but above the text). Declared in CSS 3.

  • text-overline-mode—Describes the mode of overline (like underline, but above the text). Declared in CSS 3.

  • text-overline-style—Describes the style of overline (like underline, but above the text). Declared in CSS 3.

  • text-overline-width—Describes the width of overline (like underline, but above the text). Declared in CSS 3.

  • text-underline—Composite property describing underline color, style, mode, and width. Declared in CSS 3.

  • text-underline-color—Describes the color of underline. Declared in CSS 3.

  • text-underline-mode—Describes the mode of underline. Declared in CSS 3.

  • text-underline-style—Describes the style of underline. Declared in CSS 3.

  • text-underline-width—Describes the width of underline. Declared in CSS 3.

Unsupported Properties Specific to Other Browsers

  • scrollbar-3dlight-color—Microsoft Internet Explorer property.

  • scrollbar-arrow-color—Microsoft Internet Explorer property.

  • scrollbar-darkshadow-color—Microsoft Internet Explorer property.

  • scrollbar-face-color—Microsoft Internet Explorer property.

  • scrollbar-highlight-color—Microsoft Internet Explorer property.

  • scrollbar-shadow-color—Microsoft Internet Explorer property.

  • scrollbar-track-color—Microsoft Internet Explorer property.