How we built it


The WebSocket JavaScript API provides a simple API for bi-directional communication with web servers. The WebSocket network protocol enables low overhead bi-directional communication with web servers over a persistent TCP connection.


M32 permessage-deflate extension M30 Strict subprotocol checking M23 ArrayBufferView M16 RFC 6455 M15 Binary support M14 HyBI 08 M6 Hixie 76 M4 Hixie 75



Working draft or equivalent

Status in Chromium

Enabled by default (launch bug) in:

  • Chrome for desktop release 4
  • Opera release 11
  • Opera for Android release 11

Consensus & Standardization

  • Shipped
  • Shipped
  • Shipped
  • Strongly positive


Last updated on 2015-05-15