1. Server-sent events

    Method of continuously sending data from a server to the browser, rather than repeatedly requesting it (EventSource interface, used to fall under HTML5)

  2. EventSource API

  3. EventSource API: close

  4. EventSource API: `error` event

  5. EventSource API: `EventSource()` constructor

  6. EventSource API: `EventSource()` constructor: CORS support (`withCredentials`)

  7. EventSource API: `message` event

  8. EventSource API: onerror

  9. EventSource API: onmessage

  10. EventSource API: onopen

  11. EventSource API: `open` event

  12. EventSource API: readyState

  13. EventSource API: url

  14. EventSource API: withCredentials

  15. EventSource API: Available in workers

  16. MessageEvent API: source: Returns `MessageEventSource`