puppeteer/new-docs/puppeteer.protocol.headlessexperimental.needsbeginframeschangedevent.md
2020-07-13 14:01:35 +01:00

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[Home](./index.md) &gt; [puppeteer](./puppeteer.md) &gt; [Protocol](./puppeteer.protocol.md) &gt; [HeadlessExperimental](./puppeteer.protocol.headlessexperimental.md) &gt; [NeedsBeginFramesChangedEvent](./puppeteer.protocol.headlessexperimental.needsbeginframeschangedevent.md)
## Protocol.HeadlessExperimental.NeedsBeginFramesChangedEvent interface
Issued when the target starts or stops needing BeginFrames. Deprecated. Issue beginFrame unconditionally instead and use result from beginFrame to detect whether the frames were suppressed.
<b>Signature:</b>
```typescript
export interface NeedsBeginFramesChangedEvent
```
## Properties
| Property | Type | Description |
| --- | --- | --- |
| [needsBeginFrames](./puppeteer.protocol.headlessexperimental.needsbeginframeschangedevent.needsbeginframes.md) | boolean | True if BeginFrames are needed, false otherwise. |