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.



Specification link

Specification currently under development in a Working Group

Status in Chromium


Enabled by default (tracking bug)

Consensus & Standardization

After a feature ships in Chrome, the values listed here are not guaranteed to be up to date.

  • Shipped/Shipping
  • Shipped/Shipping
  • Strongly positive



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

Last updated on 2020-11-09