36 lines
1.1 KiB
HTML
36 lines
1.1 KiB
HTML
<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>读卡器服务测试</title>
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</head>
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<body>
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<h1 id="test">暂无信息</h1>
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<script>
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var dom = document.getElementById("test");
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// 打开一个 web socket 这里端口号和上面监听的需一致
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var ws = new WebSocket('ws://localhost:3001');
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// Web Socket 已连接上
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ws.onopen = function() {
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dom.innerText = "读卡服务建立成功！";
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}
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ws.onerror = function(err) {
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dom.innerText = "读卡服务建立失败：" + err;
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}
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// 这里接受服务器端发过来的消息
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ws.onmessage = function(data) {
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var res = JSON.parse(data.data);
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dom.innerText = "当前卡号为：" + res.msg;
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}
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window.addEventListener('beforeunload', () => {
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dom.innerText = "读卡服务已关闭！";
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ws.close();
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})
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</script>
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</body>
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</html> |