web api instance property
EventSource: readyState property
Available in workers
The readyState read-only property of the
EventSource interface returns a number representing the state of the
connection.
Value
A number which is one of the three possible state constants defined on the EventSource interface:
EventSource.CONNECTING(0)- : The connection is not yet open.
EventSource.OPEN(1)- : The connection is open and ready to communicate.
EventSource.CLOSED(2)- : The connection is closed or couldn’t be opened.
Examples
const evtSource = new EventSource("sse.php");
console.log(evtSource.readyState);
[!NOTE] You can find a full example on GitHub — see Simple SSE demo using PHP.
Specifications
SpecificationsStandards references are available on the canonical MDN page.
Browser compatibility
Browser compatibilityCompatibility data is available on the canonical MDN page.