JSFiddle - React, Tailwind, and code Playground

JavaScript

var arr = [];
    function roll() {
        var randomNumber = Math.floor(Math.random() * 15) + 1;
        for (i = 0; i < 15; i++) {
            if (arr[i] != randomNumber) {
                arr[arr.length] = randomNumber;
               
            }
        } alert("This Works" + arr);
    }
roll();