puppeteer/website/versioned_docs/version-10.1.0/puppeteer.framewaitforfunctionoptions.polling.md
2021-08-10 11:09:48 +01:00

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[Home](./index.md) &gt; [puppeteer](./puppeteer.md) &gt; [FrameWaitForFunctionOptions](./puppeteer.framewaitforfunctionoptions.md) &gt; [polling](./puppeteer.framewaitforfunctionoptions.polling.md)
## FrameWaitForFunctionOptions.polling property
An interval at which the `pageFunction` is executed, defaults to `raf`. If `polling` is a number, then it is treated as an interval in milliseconds at which the function would be executed. If `polling` is a string, then it can be one of the following values:
- `raf` - to constantly execute `pageFunction` in `requestAnimationFrame` callback. This is the tightest polling mode which is suitable to observe styling changes.
- `mutation` - to execute `pageFunction` on every DOM mutation.
<b>Signature:</b>
```typescript
polling?: string | number;
```