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message event informs the target, a WebSocket, RTCDataChannel, EventSource, or a BroadcastChannel object, that a message has been received.

If the target is a RTCDataChannel, an event handler for this event can be added via the RTCDataChannel.onmessage property.

If the target is a BroadcastChannel, an event handler for this event can be added via the BroadcastChannel.onmessage property.

General info

Interface
MessageEvent or RTCDataChannelEvent
Bubbles
No
Cancelable
No
Target
RTCDataChannel, WebSocket, EventSource, BroadcastChannel
Default Action
None

Properties

A MessageEvent being an Event, this event also implements these properties.

data Read only
A DOMString containing the message received.

Methods

A MessageEvent being an Event, this event also implements its methods.

Specifications

Specification Status Comment
WebRTC 1.0: Real-time Communication Between Browsers
The definition of 'message on RTCDataChannel' in that specification.
Candidate Recommendation Adds RTCDataChannel as an EventTarget and defines when this event is sent.
HTML Living Standard
The definition of 'the message event' in that specification.
Living Standard Adds BroadcastChannel as an EventTarget and defines when this event is sent.

Browser compatibility

We're converting our compatibility data into a machine-readable JSON format. This compatibility table still uses the old format, because we haven't yet converted the data it contains. Find out how you can help!

  
Feature Chrome Edge Firefox (Gecko) Internet Explorer Opera Safari
Basic support (Yes) (Yes) (Yes) No support (Yes) ?
on BroadcastChannel No support No support 38 (38) No support No support No support
  
Feature Android Chrome for Android Edge Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support ? ? (Yes) ? No support ? ?
on BroadcastChannel  No support No support No support 38.0 (38) No support No support No support

See also