Skip to main content
Version: 21.2.1

WebWorker.evaluateHandle() method

The only difference between worker.evaluate and worker.evaluateHandle is that worker.evaluateHandle returns in-page object (JSHandle). If the function passed to the worker.evaluateHandle returns a Promise, then worker.evaluateHandle would wait for the promise to resolve and return its value. Shortcut for await worker.executionContext()).evaluateHandle(pageFunction, ...args)

Signature:

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

Parameters

ParameterTypeDescription
pageFunctionFunc | stringFunction to be evaluated in the page context.
argsParamsArguments to pass to pageFunction.

Returns:

Promise<HandleFor<Awaited<ReturnType<Func>>>>

Promise which resolves to the return value of pageFunction.