[Home](./index.md) > [puppeteer](./puppeteer.md) > [FrameWaitForFunctionOptions](./puppeteer.framewaitforfunctionoptions.md) > [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. Signature: ```typescript polling?: string | number; ```