mirror of
https://github.com/puppeteer/puppeteer
synced 2024-06-14 14:02:48 +00:00
48 lines
1.8 KiB
Markdown
48 lines
1.8 KiB
Markdown
---
|
|
sidebar_label: Frame.$$eval
|
|
---
|
|
|
|
# Frame.$$eval() method
|
|
|
|
Runs the given function on an array of elements matching the given selector in the frame.
|
|
|
|
If the given function returns a promise, then this method will wait till the promise resolves.
|
|
|
|
**Signature:**
|
|
|
|
```typescript
|
|
class Frame {
|
|
$$eval<
|
|
Selector extends string,
|
|
Params extends unknown[],
|
|
Func extends EvaluateFunc<
|
|
[Array<NodeFor<Selector>>, ...Params]
|
|
> = EvaluateFunc<[Array<NodeFor<Selector>>, ...Params]>
|
|
>(
|
|
selector: Selector,
|
|
pageFunction: Func | string,
|
|
...args: Params
|
|
): Promise<Awaited<ReturnType<Func>>>;
|
|
}
|
|
```
|
|
|
|
## Parameters
|
|
|
|
| Parameter | Type | Description |
|
|
| ------------ | -------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------- |
|
|
| selector | Selector | The selector to query for. |
|
|
| pageFunction | Func \| string | The function to be evaluated in the frame's context. An array of elements matching the given selector will be passed to the function as its first argument. |
|
|
| args | Params | Additional arguments to pass to <code>pageFunction</code>. |
|
|
|
|
**Returns:**
|
|
|
|
Promise<Awaited<ReturnType<Func>>>
|
|
|
|
A promise to the result of the function.
|
|
|
|
## Example
|
|
|
|
```js
|
|
const divsCounts = await frame.$$eval('div', divs => divs.length);
|
|
```
|