EventSource: readyState property

The readyState read-only property of the EventSource interface returns a number representing the state of the connection.

Value

A number representing the state of the connection. Possible values are:

  • 0 — connecting
  • 1 — open
  • 2 — closed

Examples

js

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

Specification
HTML Standard
# dom-eventsource-readystate-dev

Browser compatibility

BCD tables only load in the browser

See also