JSFiddle - React, Tailwind, and code Playground

by c_kick

HTML

<input type="button" id="test" value="click me!">

JavaScript

// Generates a unique number from a range
// keeps track of generated numbers in a history array
// if all numbers in the range have been returned once, keep outputting random numbers within the range
var interval;
var UniqueRandom = { NumHistory: new Array(), generate: function(maxNum) {
        var current = Math.round(Math.random()*(maxNum-1));
        if (maxNum > 1 && this.NumHistory.length > 0) {
            if (this.NumHistory.length != maxNum) {
                while($.inArray(current, this.NumHistory) != -1) { current = Math.round(Math.random()*(maxNum-1)); }
                this.NumHistory.push(current);
                return current;
            } else {
                //unique numbers done, continue outputting random numbers
                alert('done outputting unique numbers');
                clearInterval(interval);
                return false;
            }
        } else {
            //first time only
            this.NumHistory.push(current);
            return current;
        }
    }
};

$(document).ready(function () {
    $('#test').click(function() {
        
        interval = setInterval(function(){
            var $random = UniqueRandom.generate(1000);
            if($random) $('#test').after($random+", ");
        }, 10);
        
    });
});