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js怎么生成uuid?

js怎么生成uuid?

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<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <title>BFW NEW PAGE</title>

    <script type="text/javascript">
 
          alert(generateUUID());

        function generateUUID() {
            var d = new Date().getTime();
            if (window.performance && typeof window.performance.now === "function") {
                d += performance.now(); //use high-precision timer if available
            }
            var uuid = 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function (c) {
                var r = (d + Math.random() * 16) % 16 | 0;
                d = Math.floor(d / 16);
                return (c == 'x' ? r: (r & 0x3 | 0x8)).toString(16);
            });
            return uuid;
        }
    </script>
    <style>
    </style>
</head>
<body>

</body>
</html>

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