puppeteer/docs/api/puppeteer.frame.__eval.md
jrandolf 5ff205dc8b
fix: extends ElementHandle to Nodes (#8552)
* fix: extends `ElementHandle` to `Node`s (#8552)
2022-07-06 09:05:37 +02:00

1.3 KiB

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Frame.$$eval

Frame.$$eval() method

Signature:

class Frame {
  $$eval<
    Selector extends string,
    Params extends unknown[],
    Func extends EvaluateFunc<
      [Array<NodeFor<Selector>>, ...Params]
    > = EvaluateFunc<[Array<NodeFor<Selector>>, ...Params]>
  >(
    selector: Selector,
    pageFunction: Func | string,
    ...args: Params
  ): Promise<Awaited<ReturnType<Func>>>;
}

Parameters

Parameter Type Description
selector Selector the selector to query for
pageFunction Func | string the function to be evaluated in the frame's context
args Params additional arguments to pass to pageFunction

Returns:

Promise<Awaited<ReturnType<Func>>>

Remarks

This method runs Array.from(document.querySelectorAll(selector)) within the frame and passes it as the first argument to pageFunction.

If pageFunction returns a Promise, then frame.$$eval would wait for the promise to resolve and return its value.

Example

const divsCounts = await frame.$$eval('div', divs => divs.length);