Websocket 简单 demo
- 前端笔记
- 2018-08-11
- 136热度
- 0评论
websocket,可以在浏览器和服务器之间建立一个全双工通信的 socket 连接。它与 http 请求的主要区别在于,可以由服务器主动向客户端推送消息。
以下是一个简单 demo:
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width" />
<title>Websocket</title>
</head>
<body>
<h1>Echo Test</h1>
<input type="text" id="sendText">
<button id="sendBtn">发送</button>
<div id="recv"></div>
<script charset="utf-8">
function showText(text) {
document.getElementById('recv').innerHTML = text;
}
var websocket = new WebSocket('ws://echo.websocket.org/')
websocket.onopen = function() {
console.log('websocket open')
showText('Connected')
}
websocket.onclose = function() {
console.log('websocket close');
}
websocket.onmessage = function(e) {
console.log(e.data);
showText(e.data)
}
document.getElementById('sendBtn').onclick = function() {
var text = document.getElementById('sendText').value
websocket.send(text)
}
</script>
</body>
</html>