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https://github.com/puppeteer/puppeteer
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f07ad2c661
This PR updates the docs regarding configuring puppeteer. In addition, some changes have been made to the documentation generator to show default values on the documentation site. Also fixes: https://github.com/puppeteer/puppeteer/pull/9144
48 lines
1.8 KiB
Markdown
48 lines
1.8 KiB
Markdown
---
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sidebar_label: Frame.$$eval
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---
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# Frame.$$eval() method
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Runs the given function on an array of elements matching the given selector in the frame.
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If the given function returns a promise, then this method will wait till the promise resolves.
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#### Signature:
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```typescript
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class Frame {
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$$eval<
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Selector extends string,
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Params extends unknown[],
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Func extends EvaluateFunc<
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[Array<NodeFor<Selector>>, ...Params]
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> = EvaluateFunc<[Array<NodeFor<Selector>>, ...Params]>
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>(
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selector: Selector,
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pageFunction: Func | string,
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...args: Params
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): Promise<Awaited<ReturnType<Func>>>;
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}
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```
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## Parameters
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| Parameter | Type | Description |
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| ------------ | -------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------- |
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| selector | Selector | The selector to query for. |
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| pageFunction | Func \| string | The function to be evaluated in the frame's context. An array of elements matching the given selector will be passed to the function as its first argument. |
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| args | Params | Additional arguments to pass to <code>pageFunction</code>. |
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**Returns:**
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Promise<Awaited<ReturnType<Func>>>
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A promise to the result of the function.
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## Example
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```js
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const divsCounts = await frame.$$eval('div', divs => divs.length);
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```
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