puppeteer/new-docs/puppeteer.protocol.emulation.virtualtimepolicy.md

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[Home](./index.md) &gt; [puppeteer](./puppeteer.md) &gt; [Protocol](./puppeteer.protocol.md) &gt; [Emulation](./puppeteer.protocol.emulation.md) &gt; [VirtualTimePolicy](./puppeteer.protocol.emulation.virtualtimepolicy.md)
## Protocol.Emulation.VirtualTimePolicy type
advance: If the scheduler runs out of immediate work, the virtual time base may fast forward to allow the next delayed task (if any) to run; pause: The virtual time base may not advance; pauseIfNetworkFetchesPending: The virtual time base may not advance if there are any pending resource fetches.
<b>Signature:</b>
```typescript
export type VirtualTimePolicy = ('advance' | 'pause' | 'pauseIfNetworkFetchesPending');
```