EventSource.readyState

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

Syntax

var myReadyState = eventSource.readyState;

Value

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

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

Examples

var 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 Status Comment
HTML Living Standard
The definition of 'readyState' in that specification.
Living Standard Initial definition

Browser compatibility

BCD tables only load in the browser

See also