Worker()

aURL

USVString, представляющая URL-адрес скрипта который будет выполняться worker. Он должен подчиняться политике одного источника.

options Необязательный

An object containing option properties that can be set when creating the object instance. Available properties are as follows:

• type: A DOMString specifying the type of worker to create. The value can be classic or module. If not specified, the default used is classic.
• credentials: A DOMString specifying the type of credentials to use for the worker. The value can be omit, same-origin, or include. If not specified, or if type is classic, the default used is omit (no credentials required).
• name: A DOMString specifying an identifying name for the DedicatedWorkerGlobalScope (en-US) representing the scope of the worker, which is mainly useful for debugging purposes.

• A SecurityError is raised if the document is not allowed to start workers.
• A NetworkError is raised if the MIME type of one of the script is text/csv, image/*, video/*, or audio/*. It should always be text/javacript.
• A SyntaxError is raised if aURL cannot be parsed.

Следующий фрагмент кода показывает создание объекта Worker с помощью конструктора Worker() и его последующее использование:

var myWorker = new Worker('worker.js');

first.onchange = function() {
  myWorker.postMessage([first.value,second.value]);
  console.log('Message posted to worker');
}

Больше примеров можно найти здесь: Basic dedicated worker example (run dedicated worker).

Интерфейс Worker