Frame.$eval() method

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

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 document.querySelector 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 searchValue = await frame.$eval('#search', el => el.value);