Skip to main content
Module

x/puppeteer/vendor/puppeteer-core/puppeteer/api-docs-entry.d.ts>WebWorker

A port of puppeteer running on Deno
lucacasonato/deno-puppeteer
Very Popular
Go to Latest
class WebWorker
extends EventEmitter
Re-export
import { WebWorker } from "https://deno.land/x/puppeteer@14.1.1/vendor/puppeteer-core/puppeteer/api-docs-entry.d.ts";

The WebWorker class represents a WebWorker.

Examples

Example 1

page.on('workercreated', worker => console.log('Worker created: ' + worker.url()));
page.on('workerdestroyed', worker => console.log('Worker destroyed: ' + worker.url()));

console.log('Current workers:');
for (const worker of page.workers()) {
  console.log('  ' + worker.url());
}

Constructors

new
WebWorker(
client: CDPSession,
url: string,
consoleAPICalled: ConsoleAPICalledCallback,
exceptionThrown: ExceptionThrownCallback,
)

Properties

_client: CDPSession
_executionContextCallback: (value: ExecutionContext) => void
_executionContextPromise: Promise<ExecutionContext>
_url: string

Methods

evaluate<ReturnType>(pageFunction: Function | string, ...args: any[]): Promise<ReturnType>

If the function passed to the worker.evaluate returns a Promise, then worker.evaluate would wait for the promise to resolve and return its value. If the function passed to the worker.evaluate returns a non-serializable value, then worker.evaluate resolves to undefined. DevTools Protocol also supports transferring some additional values that are not serializable by JSON: -0, NaN, Infinity, -Infinity, and bigint literals. Shortcut for await worker.executionContext()).evaluate(pageFunction, ...args).

evaluateHandle<HandlerType extends JSHandle = JSHandle>(pageFunction: EvaluateHandleFn, ...args: SerializableOrJSHandle[]): Promise<JSHandle>

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)

executionContext(): Promise<ExecutionContext>

Returns the ExecutionContext the WebWorker runs in

url(): string