需求:js生成不重复标识符 id。
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 | var uuid = formatDateTime() + Math.random().toString(36).substr(2); function formatDateTime() { var date = new Date(); var y = date.getFullYear(); var m = date.getMonth() + 1; m = m < 10 ? ('0' + m) : m; var d = date.getDate(); d = d < 10 ? ('0' + d) : d; var h = date.getHours(); var minute = date.getMinutes(); var second = date.getSeconds(); return y + m + d + h + minute + second; } console.log(uuid) // 20190212142639jreyv1t83yd |
1 2 3 4 5 6 7 8 9 10 11 12 13 | 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; } console.log( generateUUID() ) // f0ed305c-ec19-4967-b323-eef07a4cf2d8 |
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