WebSocket.constructor

The WebSocket() constructor returns a new WebSocket object.

Syntax

var ws = new WebSocket("ws://localhost:8080");

Parameters

url

The URL to which to connect; this should be the URL to which the WebSocket server will respond.

protocols Optional

Either a single protocol string or an array of protocol strings. These strings are used to indicate sub-protocols, so that a single server can implement multiple WebSocket sub-protocols (for example, you might want one server to be able to handle different types of interactions depending on the specified protocol). If you don't specify a protocol string, an empty string is assumed.

Exceptions thrown

SECURITY_ERR

The port to which the connection is being attempted is being blocked.

Specifications

Browser compatibilityUpdate compatibility data on GitHub