puppeteer.jshandle.evaluate.md

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JSHandle.evaluate

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.

Signature:

class JSHandle {
  evaluate<
    Params extends unknown[],
    Func extends EvaluateFunc<[this, ...Params]> = EvaluateFunc<
      [this, ...Params]
    >
  >(
    pageFunction: Func | string,
    ...args: Params
  ): Promise<Awaited<ReturnType<Func>>>;
}

Parameters

Parameter	Type	Description
pageFunction	Func | string
args	Params

Returns:

Promise<Awaited<ReturnType<Func>>>

Example

const tweetHandle = await page.$('.tweet .retweets');
expect(await tweetHandle.evaluate(node => node.innerText)).toBe('10');