<script>
var ws = new WebSocket("wss://echo.websocket.org");
??????? ws.onopen = function(evt) {
??????? console.log("Connection open ...");
??????? ws.send("Hello WebSockets!");
??????? };
??????? ws.onmessage = function(evt) {
??????? console.log( "Received Message: " + evt.data);
??????? ws.close();
??????? };
??????? ws.onclose = function(evt) {
??????? console.log("Connection closed.");
??????? }; ?????
???</script>
初识WebSocket
原文地址：https://www.cnblogs.com/niuwenli/p/9235239.html