Как перемешать массив случайным образом без повторений на чистом JavaScript?

next_q = new Array();
    next_q[0]=document. getElementById ("question1");
    next_q[1]=document. getElementById ("question2");
    next_q[2]=document. getElementById ("question3");
    next_q[3]=document. getElementById ("question4");
    next_q[N]=document. getElementById (question_N");
var m = Math.round(Math.random()*45);
next_q[m].style.display="block";

Array.prototype.shuffle = function( b )
{
 var i = this.length, j, t;
 while( i ) 
 {
  j = Math.floor( ( i-- ) * Math.random() );
  t = b && typeof this[i].shuffle!=='undefined' ? this[i].shuffle() : this[i];
  this[i] = this[j];
  this[j] = t;
 }
 return this;
};

Array.prototype.shuffle = function() {
    return this.sort(function() {
        return 0.5 - Math.random();
    });
};
 
var N = 10000, a = [], i;
for (i = 0; i < 10; i++) {
    a[i] = 0;
}
for (i = 0; i < N; i++) {
    a[[0, 1, 2, 3, 4, 5, 6, 7, 8, 9].shuffle()[0]]++;
}
alert(a);

function shakeUp(size){
    let arr = new Array(size).fill(0).map((el, i) => i);
    for(let i = arr.length - 1; i > 0; i--){
        let j = Math.floor(Math.random() * i);
        let tmp = arr[i];
        arr[i] = arr[j];
        arr[j] = tmp;
    }
    return arr;
}
let testQuestion = document.getElementById('testQuestion');
let questions = ['Вопрос 1','Вопрос 2','Вопрос 3','Вопрос 4','Вопрос 5'];
let shufArr = shakeUp(questions.length);
let nxt = document.getElementById('nxt');
let x = 0;
const flippingQuestions = () => {
    if(x >= questions.length)
        return false;
    testQuestion.innerText = questions[shufArr[x++]];
}
nxt.addEventListener('click', flippingQuestions);

Array.prototype.shuffle