Web conferencing. Implement peer to peer conferencing with the WebRTC standard.

Metrics. Test your code using new tools for measuring code and network performance.

WebAssembly. Writer smaller, faster web apps.

New WKWebView APIs. Capture snapshots, handle custom URL schemes, manage cookies more effectively, and implement web content filtering.

New in Safari 11.0 - Handle custom schemes.

• Added WKURLSchemeHandler, a protocol for handling custom schemes.

New in Safari 11.0 – More effective cookie management.

• Added WKHTTPCookieStore, an object that manages the HTTP cookies associated with a particular WKWebsiteDataStore.

New in Safari 11.0 – Support for snapshots.

• Added takeSnapshot(with:completionHandler:) to WKWebView, a method to capture a snapshot of the visible part of the webpage.

New in Safari 11.0 - Rule-based content handling.

• Added WKContentRuleList, a compiled list of rules to apply to web content.

New in Safari 11.0 – Share authenticated login sessions.

• Added SFAuthenticationSession, a new API for authenticating a user with a web service, and then to share that authentication with other apps.

• Use the init method to start the authentication session, providing the URL of the webpage in the url parameter. After completing the authentication, the completion handler is called either with an authentication token, or with an error.

• The authentication page presented by SFAuthenticationSession has access to Safari cookies and other website data.

Updated SFSafariViewController.

• Added functionality to change the title of the button used to dismiss the view controller, to exclude activity items from the share sheet, and to disable bar collapsing.

New in Safari 11.0 – Support for real-time communication using WebRTC.

New in Safari 11.0 – Camera and microphone access.

• Added support for the Media Capture API.

• Added ability for websites to access camera and microphone streams from a user's device (user permission is required.)

New in Safari 11.0 – WebAssembly.

• Added support for WebAssembly, a fast, efficient, portable, and safe code format.

Updated Safari to the latest version of the WebCrypto API.

• Includes new cryptographic algorithms like: AES-CFB, AES-GCM, ECDH, and PBKDF2.

• SubtleCrypto is no longer prefixed and is now asynchronous.

New in Safari 11.0 – Resource timing.

• Added support for collecting detailed measurements of all network timing data for every resource on the page.

• Added support for Resource Timing Level 2, Performance Timing Level 2, and for User Timing Level 2.

• Added metrics for developers to identify client-side performance issues for web apps.

New in Safari 11.0 – Drag and drop in iOS.

• Added DOM events on iOS for drag and drop: dragstart, dragenter, dragover, dragexit, dragleave, dragend, and drop.

Updated WebKit support for home screen apps.

• Web applications saved to the home screen now support all features of modern WebKit, such as Fast-Tap, scroll snapping and the new visual viewports behavior.

New in Safari 11.0 - Enhanced user privacy by preventing cross-site tracking.

• Added Intelligent Tracking Prevention, which updates the default cookie and website data policy to isolate and remove cookies and website data for sites with the ability to track users across-site.

Updated file restrictions to block cross origin access by default.

• CORS and cross origin access from file:// are now blocked unless Disable Local File Restrictions is selected from the Develop menu.

New in Safari 11.0 – Variable fonts.

• Added support for font variations defined in the CSS Fonts Module 4 specification. For more detail, see Variable Fonts. Requires macOS 10.13 High Sierra or later, or iOS 11 or later.

New in Safari 11.0 – CSS stroke support.

• Added stroke properties from the CSS Stroke specifications including paint-order, stroke-linejoin, stroke-linecap, stroke-color, stroke-width, and stroke-miterlimit.

New in Safari 11.0 – Inspect WebSocket connections.

• Added debugging of WebSocket connections and messages.

New in Safari 11.0 – Right-to-left layouts.

• Updated the Web Inspector UI to use a right-to-left (RTL) mode when the preferred language is an RTL language.

Added DOM breakpoints and XHR breakpoints.

• Added breakpoints to pause script execution and display JavaScript that modifies elements in the DOM, or that makes an XMLHttpRequest to a resource.

New in Safari 11.0 – Content blocker rules.

• Added if-top-url and unless-top-url, new triggers that execute when a regular expression is matched against the entirety of the main document URL.