MessageEvent: data 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 data read-only property of the MessageEvent interface represents the data sent by the message emitter.

Value

The data sent by the message emitter; this can be any data type, depending on what originated this event.

Examples

js

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

Specifications

Specification
HTML # dom-messageevent-data-dev

Browser compatibility

See also

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