MessageEvent: origin property

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.

Note: This feature is available in Web Workers.

The origin read-only property of the MessageEvent interface is a string representing the origin of the message emitter.

Value

A string representing the origin.

Examples

js

myWorker.onmessage = (e) => {
  result.textContent = e.data;
  console.log("Message received from worker");
  console.log(e.origin);
};

Specifications

Specification
HTML Standard # dom-messageevent-origin-dev

Browser compatibility

BCD tables only load in the browser

See also

ExtendableMessageEvent — similar to this interface but used in interfaces that needs to give more flexibility to authors.