BroadcastChannel: messageerror event
The messageerror
event is fired on a BroadcastChannel
object when a message that can't be deserialized arrives on the channel.
Syntax
Use the event name in methods like addEventListener()
, or set an event handler property.
js
addEventListener("messageerror", (event) => { })
onmessageerror = (event) => { }
Event type
A MessageEvent
. Inherits from Event
.
Event properties
In addition to the properties listed below, properties from the parent interface, Event
, are available.
data
Read only-
The data sent by the message emitter.
origin
Read only-
A string representing the origin of the message emitter.
lastEventId
Read only-
A string representing a unique ID for the event.
source
Read only-
A message event source, which is either a WindowProxy, a
MessagePort
, or aServiceWorker
object representing the message emitter. ports
Read only-
An array of
MessagePort
objects representing the ports associated with the channel the message is being sent through (where appropriate, e.g. in channel messaging or when sending a message to a shared worker).
Examples
This code uses addEventListener
to listen for messages and errors:
js
const channel = new BroadcastChannel("example-channel");
channel.addEventListener("message", (event) => {
received.textContent = event.data;
});
channel.addEventListener("messageerror", (event) => {
console.error(event);
});
The same, but using the onmessage
and onmessageerror
event handler properties:
js
const channel = new BroadcastChannel("example-channel");
channel.onmessage = (event) => {
received.textContent = event.data;
};
channel.onmessageerror = (event) => {
console.log(event);
};
Specifications
Specification |
---|
HTML Standard # event-messageerror |
HTML Standard # handler-broadcastchannel-onmessageerror |
Browser compatibility
BCD tables only load in the browser
See also
- Related events:
message
.