mirror of
https://github.com/puppeteer/puppeteer
synced 2024-06-14 14:02:48 +00:00
51 lines
1.9 KiB
Markdown
51 lines
1.9 KiB
Markdown
---
|
|
sidebar_label: ElementHandle.$eval
|
|
---
|
|
|
|
# ElementHandle.$eval() method
|
|
|
|
Runs the given function on the first element matching the given selector in the current element.
|
|
|
|
If the given function returns a promise, then this method will wait till the promise resolves.
|
|
|
|
#### Signature:
|
|
|
|
```typescript
|
|
class ElementHandle {
|
|
$eval<
|
|
Selector extends string,
|
|
Params extends unknown[],
|
|
Func extends EvaluateFuncWith<NodeFor<Selector>, Params> = EvaluateFuncWith<
|
|
NodeFor<Selector>,
|
|
Params
|
|
>
|
|
>(
|
|
selector: Selector,
|
|
pageFunction: Func | string,
|
|
...args: Params
|
|
): Promise<Awaited<ReturnType<Func>>>;
|
|
}
|
|
```
|
|
|
|
## Parameters
|
|
|
|
| Parameter | Type | Description |
|
|
| ------------ | -------------- | ----------------------------------------------------------------------------------------------------------------------------------------------- |
|
|
| selector | Selector | The selector to query for. |
|
|
| pageFunction | Func \| string | The function to be evaluated in this element's page's context. The first element matching the selector will be passed in as the first argument. |
|
|
| args | Params | Additional arguments to pass to <code>pageFunction</code>. |
|
|
|
|
**Returns:**
|
|
|
|
Promise<Awaited<ReturnType<Func>>>
|
|
|
|
A promise to the result of the function.
|
|
|
|
## Example
|
|
|
|
```ts
|
|
const tweetHandle = await page.$('.tweet');
|
|
expect(await tweetHandle.$eval('.like', node => node.innerText)).toBe('100');
|
|
expect(await tweetHandle.$eval('.retweets', node => node.innerText)).toBe('10');
|
|
```
|