JSFiddle - React, Tailwind, and code Playground

HTML

<div id="myDiv"></div>

JavaScript

function shuffle(a) {
  var c=a.length,t,r;
  while (0 !== c) {
    r = Math.floor(Math.random() * c);
    c -= 1;t = a[c];a[c] = a[r];a[r] = t;
  }
  return a;
}

var thumbnailArray = [
    'contentarray1',
    'contentarray2',
    'contentarray3',
    'contentarray4',
    'contentarray5',
    'contentarray6',
    'contentarray7',
    'contentarray8',
    'contentarray9'
];

shuffle( thumbnailArray );
thumbnailquery();

function thumbnailquery () {
    for (var i = 0; i <= 3; i++) {
       $('#myDiv').prepend( thumbnailArray.pop() + '<br>');
    }
}