1
 2/**
 3 * Module dependencies.
 4 */
 5
 6var global = (function() { return this; })();
 7
 8/**
 9 * WebSocket constructor.
10 */
11
12var WebSocket = global.WebSocket || global.MozWebSocket;
13
14/**
15 * Module exports.
16 */
17
18module.exports = WebSocket ? ws : null;
19
20/**
21 * WebSocket constructor.
22 *
23 * The third `opts` options object gets ignored in web browsers, since it's
24 * non-standard, and throws a TypeError if passed to the constructor.
25 * See: https://github.com/einaros/ws/issues/227
26 *
27 * @param {String} uri
28 * @param {Array} protocols (optional)
29 * @param {Object) opts (optional)
30 * @api public
31 */
32
33function ws(uri, protocols, opts) {
34  var instance;
35  if (protocols) {
36    instance = new WebSocket(uri, protocols);
37  } else {
38    instance = new WebSocket(uri);
39  }
40  return instance;
41}
42
43if (WebSocket) ws.prototype = WebSocket.prototype;