uniqid() in javascript/jquery?

Question

what's the equivalent of this function in javascript:

http://php.net/manual/en/function.uniqid.php

Basically I need to generate a random ID that looks like: a4245f54345 and starts with a alphabetic character (so I can use it as a CSS id)

Answer 1

I have been using this...

I use it exactly as I would if it where PHP. Both return the same result.

function uniqid(prefix = "", random = false) {
    const sec = Date.now() * 1000 + Math.random() * 1000;
    const id = sec.toString(16).replace(/\./g, "").padEnd(14, "0");
    return `${prefix}${id}${random ? `.${Math.trunc(Math.random() * 100000000)}`:""}`;
};

Answer 2

function uniqId(prefix) {
    if (window.performance) {
        var s = performance.timing.navigationStart;
        var n = performance.now();
        var base = Math.floor((s + Math.floor(n))/1000);
    } else {
        var n = new Date().getTime();
        var base = Math.floor(n/1000);
    }   
    var ext = Math.floor(n%1000*1000);
    var now = ("00000000"+base.toString(16)).slice(-8)+("000000"+ext.toString(16)).slice(-5);
    if (now <= window.my_las_uid) {
        now = (parseInt(window.my_las_uid?window.my_las_uid:now, 16)+1).toString(16);
    }
    window.my_las_uid = now;
    return (prefix?prefix:'')+now;
}

it is generated on "the same" priciple as PHP's uniqId() - specifically encoded time in microseconds.