JSFiddle - React, Tailwind, and code Playground
HTML
<div id="demo"></div>
JavaScript
var arr = [1, 2, 3, 5, 4, 6, 2, 5, 6, , 6, 6, 2];
var c = {};
var s = [];
for (var i = 0; i < arr.length; i++) {
c[arr[i]] = c[arr[i]] || 0;
c[arr[i]]++;
}
for (var key in c) {
s.push([key, c[key]]);
}
s.sort(function(a, b) {
return b[1] - a[1];
});
var myArray = s[0][0];
document.getElementById('demo').innerHTML = "Number Count : " + myArray;