// 添加唯一编码
function fn_Guid() {
function s4() {
return Math.floor((1 + Math.random()) * 0x10000).toString(16).substring(1);
}
return (s4() +s4() +"-" +s4() +"-" +s4() +"-" + s4() +"-" +s4() +s4() +s4()
);
}
console.log( fn_Guid() );//5ab57ce8-8e90-65ef-1815-6a11102a2300
function fn_Guid(len, radix) {
var chars = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz'.split('');
var uuid = [],
i;
radix = radix || chars.length;
if (len) {
// Compact form
for (i = 0; i < len; i++) uuid[i] = chars[0 | Math.random() * radix];
} else {
// rfc4122, version 4 form
var r;
// rfc4122 requires these characters
uuid[8] = uuid[13] = uuid[18] = uuid[23] = '-';
uuid[14] = '4';
// Fill in random data. At i==19 set the high bits of clock sequence as
// per rfc4122, sec. 4.1.5
for (i = 0; i < 36; i++) {
if (!uuid[i]) {
r = 0 | Math.random() * 16;
uuid[i] = chars[(i == 19) ? (r & 0x3) | 0x8 : r];
}
}
}
return uuid.join('');
}
console.log( fn_Guid() ); // B0A9158E-C37A-4226-B084-D313383A6E3B
function fn_Guid() {
var s = [];
var hexDigits = "0123456789abcdef";
for (var i = 0; i < 36; i++) {
s[i] = hexDigits.substr(Math.floor(Math.random() * 0x10), 1);
}
s[14] = "4"; // bits 12-15 of the time_hi_and_version field to 0010
s[19] = hexDigits.substr((s[19] & 0x3) | 0x8, 1); // bits 6-7 of the clock_seq_hi_and_reserved to 01
s[8] = s[13] = s[18] = s[23] = "-";
var uuid = s.join("");
return uuid;
}
console.log( fn_Guid() ) ; // ab683eca-5616-41d7-8d73-307f26957339
function fn_Guid() {
return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function (c) {
var r = Math.random() * 16 | 0,
v = c == 'x' ? r : (r & 0x3 | 0x8);
return v.toString(16);
});
}
console.log( fn_Guid() ); // 12c96135-d4b6-488f-ba1d-449b27851e0b
function fn_Guid() {
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是随机种子
d = Math.floor(d / 16);
return (c == 'x' ? r : (r & 0x3 | 0x8)).toString(16);
});
return uuid;
}
console.log( fn_Guid() ) ; // 826fe4be-631c-4a63-83e9-96a788e8a569
var uuid = new Date().getTime() + Math.random().toString(36).substr(2);
console.log( uuid ); // 1590753224242oqgomgkv7tp
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;
}
var uuid = formatDateTime() + Math.random().toString(36).substr(2);
console.log(uuid); // 20200529195844692wbkvn5l