How can I make a random array with no repeats?

Question

I\'ve been searching around for some answers to this issue, but nothing seems to work when I try to find a solution.

What I\'m trying to achieve is to make a spinner

Answer 1

This function will use Math.random() to randomly choose a number in an array, and not choosing it again until all numbers were used:

var originalArray = ['360', '330', '300', '270', '240', '210', 
'180', '150', '120', '90', '60', '30'];

var totalSpin = [];

function spinArray(){
    var spin = Math.floor(Math.random()*originalArray.length);
    if(totalSpin.indexOf(spin) == -1){
        totalSpin.push(spin);
        parag.innerHTML = originalArray[spin];
    } else { 
        spinArray(); 
    }
    if(totalSpin.length == originalArray.length)
          totalSpin = [];
}

Here is the fiddle: https://jsfiddle.net/628yqz0v/4/