web api instance method
MessagePort: start() method
Available in workers
The start() method of the MessagePort
interface starts the sending of messages queued on the port. This method is only needed
when using addEventListener; it is implied when using
onmessage.
Syntax
start()
Parameters
None.
Return value
None (undefined).
Examples
In the following code block, you can see a handleMessage handler function,
run when a message is sent back to this document using onmessage:
channel.port1.onmessage = handleMessage;
function handleMessage(e) {
para.innerHTML = e.data;
}
Another option would be to do this using addEventListener,
however, when this method is used, you need to explicitly call start() to
begin the flow of messages to this document:
channel.port1.addEventListener("message", handleMessage);
function handleMessage(e) {
para.innerHTML = e.data;
textInput.value = "";
}
channel.port1.start();
Specifications
SpecificationsStandards references are available on the canonical MDN page.
Browser compatibility
Browser compatibilityCompatibility data is available on the canonical MDN page.