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48 lines
1.3 KiB
Markdown
48 lines
1.3 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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**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 |
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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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## Remarks
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This method runs `Array.from(document.querySelectorAll(selector))` within the frame and passes it as the first argument to `pageFunction`.
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If `pageFunction` returns a Promise, then `frame.$$eval` would wait for the promise to resolve and return its value.
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## Example
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```ts
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const divsCounts = await frame.$$eval('div', divs => divs.length);
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```
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