34ff00e2fe
* fix: added parts of website * fix: removed unnecessary lines * fix: updated contributing.md * fix: added parts of sidebar * fix: added all APIs * fix: added version 10.0.0 Co-authored-by: Jack Franklin <jacktfranklin@chromium.org>
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Home > puppeteer > ElementHandle > $eval
ElementHandle.$eval() method
This method runs document.querySelector within the element and passes it as the first argument to pageFunction. If there's no element matching selector, the method throws an error.
If pageFunction returns a Promise, then frame.$eval would wait for the promise to resolve and return its value.
Signature:
$eval<ReturnType>(selector: string, pageFunction: (element: Element, ...args: unknown[]) => ReturnType | Promise<ReturnType>, ...args: SerializableOrJSHandle[]): Promise<WrapElementHandle<ReturnType>>;
Parameters
| Parameter | Type | Description |
|---|---|---|
| selector | string | |
| pageFunction | (element: Element, ...args: unknown[]) => ReturnType | Promise<ReturnType> | |
| args | SerializableOrJSHandle[] |
Returns:
Promise<WrapElementHandle<ReturnType>>
Example
const tweetHandle = await page.$('.tweet');
expect(await tweetHandle.$eval('.like', node => node.innerText)).toBe('100');
expect(await tweetHandle.$eval('.retweets', node => node.innerText)).toBe('10');