puppeteer/new-docs/puppeteer.jshandle.evaluate.md
2020-07-10 11:52:13 +01:00

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[Home](./index.md) &gt; [puppeteer](./puppeteer.md) &gt; [JSHandle](./puppeteer.jshandle.md) &gt; [evaluate](./puppeteer.jshandle.evaluate.md)
## JSHandle.evaluate() method
This method passes this handle as the first argument to `pageFunction`<!-- -->. If `pageFunction` returns a Promise, then `handle.evaluate` would wait for the promise to resolve and return its value.
<b>Signature:</b>
```typescript
evaluate<T extends EvaluateFn>(pageFunction: T | string, ...args: SerializableOrJSHandle[]): Promise<UnwrapPromiseLike<EvaluateFnReturnType<T>>>;
```
## Parameters
| Parameter | Type | Description |
| --- | --- | --- |
| pageFunction | T \| string | |
| args | [SerializableOrJSHandle](./puppeteer.serializableorjshandle.md)<!-- -->\[\] | |
<b>Returns:</b>
Promise&lt;[UnwrapPromiseLike](./puppeteer.unwrappromiselike.md)<!-- -->&lt;[EvaluateFnReturnType](./puppeteer.evaluatefnreturntype.md)<!-- -->&lt;T&gt;&gt;&gt;
## Example
```js
const tweetHandle = await page.$('.tweet .retweets');
expect(await tweetHandle.evaluate(node => node.innerText)).toBe('10');
```