JSFiddle - React, Tailwind, and code Playground

by Alexander

JavaScript

console.clear();

function uid1(){
    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);
        });
}

function uid2(){
    var d = new Date().getTime();
    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&0x7|0x8)).toString(16);
        });
    return uuid;
}

for (var i=0; i<10; i++){
    var s = uid1();
    console.log( s, s.length );
}

console.log('_________________');

for (var i=0; i<10; i++){
    var s = uid2();
    console.log( s, s.length );
}