socket_programming/index.htm at master · aoyinke/socket_programming · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>WebSocket</title>
</head>
<body>
    <h1>Char Room</h1>
    <input type="text" id="sendTxt">
    <button id="sendBtn">发送</button>
</body>
<script>
    var websocket = new WebSocket("ws://localhost:3000/");
    function showMessage(str,type){
        var div = document.createElement('div');
        div.innerHTML = str;
        if(type == "entering"){
            div.style.color = "blue"
        }else if(type=="leaving"){
            div.style.color = "red"
        }
        document.body.appendChild(div);
    }
    websocket.onopen = function(){
        console.log('websocket open');
        document.getElementById('sendBtn').onclick = function(){
            var txt = document.getElementById("sendTxt").value;
            if(txt){
                websocket.send(txt)
            }

        }

    }
    websocket.onclose = function(){
        console.log("websocket closed");
    }
    websocket.onmessage = function(msg){
        console.log(msg.data)
        var msg = JSON.parse(msg.data);
        showMessage(msg.data,msg.type)

    }

</script>
</html>