mirror of
https://github.com/puppeteer/puppeteer
synced 2024-06-14 14:02:48 +00:00
d963fcdd80
Co-authored-by: release-please[bot] <55107282+release-please[bot]@users.noreply.github.com>
98 lines
1.5 KiB
Markdown
98 lines
1.5 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 {
|
|
$eval<
|
|
Selector extends string,
|
|
Params extends unknown[],
|
|
Func extends EvaluateFuncWith<NodeFor<Selector>, Params> = EvaluateFuncWith<
|
|
NodeFor<Selector>,
|
|
Params
|
|
>,
|
|
>(
|
|
selector: Selector,
|
|
pageFunction: Func | string,
|
|
...args: Params
|
|
): Promise<Awaited<ReturnType<Func>>>;
|
|
}
|
|
```
|
|
|
|
## Parameters
|
|
|
|
<table><thead><tr><th>
|
|
|
|
Parameter
|
|
|
|
</th><th>
|
|
|
|
Type
|
|
|
|
</th><th>
|
|
|
|
Description
|
|
|
|
</th></tr></thead>
|
|
<tbody><tr><td>
|
|
|
|
selector
|
|
|
|
</td><td>
|
|
|
|
Selector
|
|
|
|
</td><td>
|
|
|
|
The selector to query for.
|
|
|
|
</td></tr>
|
|
<tr><td>
|
|
|
|
pageFunction
|
|
|
|
</td><td>
|
|
|
|
Func \| string
|
|
|
|
</td><td>
|
|
|
|
The function to be evaluated in this element's page's context. The first element matching the selector will be passed in as the first argument.
|
|
|
|
</td></tr>
|
|
<tr><td>
|
|
|
|
args
|
|
|
|
</td><td>
|
|
|
|
Params
|
|
|
|
</td><td>
|
|
|
|
Additional arguments to pass to `pageFunction`.
|
|
|
|
</td></tr>
|
|
</tbody></table>
|
|
**Returns:**
|
|
|
|
Promise<Awaited<ReturnType<Func>>>
|
|
|
|
A promise to the result of the function.
|
|
|
|
## Example
|
|
|
|
```ts
|
|
const tweetHandle = await page.$('.tweet');
|
|
expect(await tweetHandle.$eval('.like', node => node.innerText)).toBe('100');
|
|
expect(await tweetHandle.$eval('.retweets', node => node.innerText)).toBe('10');
|
|
```
|