EventSource.onopen

The onopen property of the EventSource interface is an event handler called when an open event is received, that is when the connection was just opened.

Syntax

eventSource.onopen = function

Examples

evtSource.onopen = function() {
  console.log("Connection to server opened.");
};

Note: You can find a full example on GitHub — see Simple SSE demo using PHP.

Specifications

Specification
HTML Standard (HTML)
# handler-eventsource-onopen

Browser compatibility

BCD tables only load in the browser

See also