Skip to main content
Version: 22.9.0

Frame.$eval() method

Runs the given function on the first element matching the given selector in the frame.

If the given function returns a promise, then this method will wait till the promise resolves.

Signature:

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

Parameters

Parameter

Type

Description

selector

Selector

The selector to query for.

pageFunction

string | Func

The function to be evaluated in the frame's context. The first element matching the selector will be passed to the function as its first argument.

args

Params

Additional arguments to pass to pageFunction.

Returns:

Promise<Awaited<ReturnType<Func>>>

A promise to the result of the function.

Example

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