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# TimelineView.Context

Information passed to a timeline view’s content callback.

```
struct Context
```

## Overview

The context includes both the [`date`](/documentation/SwiftUI/TimelineView/Context/date) from the schedule that triggered
the callback, and a [`cadence`](/documentation/SwiftUI/TimelineView/Context/cadence-swift.property) that you can use
to customize the appearance of your view. For example, you might choose
to display the second hand of an analog clock only when the cadence is
[`TimelineView.Context.Cadence.seconds`](/documentation/SwiftUI/TimelineView/Context/Cadence-swift.enum/seconds) or faster.

## Topics

### Getting the date

[`date`](/documentation/SwiftUI/TimelineView/Context/date)

The date from the schedule that triggered the current view update.

### Getting the cadence

[`cadence`](/documentation/SwiftUI/TimelineView/Context/cadence-swift.property)

The rate at which the timeline updates the view.

[`TimelineView.Context.Cadence`](/documentation/SwiftUI/TimelineView/Context/Cadence-swift.enum)

A rate at which timeline views can receive updates.

### Invalidating the context

[`invalidateTimelineContent()`](/documentation/SwiftUI/TimelineView/Context/invalidateTimelineContent())

Resets any pre-rendered views the system has from the timeline.


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