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ElementHandle.$$eval() method

This method runs document.querySelectorAll 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<Selector extends keyof HTMLElementTagNameMap, Params extends unknown[], Func extends EvaluateFunc<[
        HTMLElementTagNameMap[Selector][],
        ...Params
    ]> = EvaluateFunc<[HTMLElementTagNameMap[Selector][], ...Params]>>(selector: Selector, pageFunction: Func | string, ...args: Params): Promise<Awaited<ReturnType<Func>>>;

Parameters​

ParameterTypeDescription
selectorSelector
pageFunctionFunc | string
argsParams

Returns:

Promise<Awaited<ReturnType<Func>>>

Example 1​

<div class="feed">
  <div class="tweet">Hello!</div>
  <div class="tweet">Hi!</div>
</div>

Example 2​

const feedHandle = await page.$('.feed');
expect(
  await feedHandle.$$eval('.tweet', nodes => nodes.map(n => n.innerText))
).toEqual(['Hello!', 'Hi!']);