JavaScript generate random numbers without repeating

Question

I have some code where I have an array of x amount of items. In this case, videos, and I want to randomly call a video, however if the current video already called is the sa

Answer 1

You can create an array to keep the exiting generated numbers.

var existingNumbers = [];
var maxNumbers = 5;
var randomNumber = function() {
  if (existingNumbers.length != maxNumbers) {
    do {
      getRandomNumber = Math.floor(Math.random() * maxNumbers);
    } while (existingNumbers.indexOf(getRandomNumber) > -1);
    existingNumbers.push(getRandomNumber);
   
    var random = videoLinks[getRandomNumber]
    document.getElementById("videoWrapper").innerHTML = random[0];
  }
};