JSFiddle - React, Tailwind, and code Playground

by nimishgoel056

JavaScript

var master = [1, 2, 3, 4, 5];
var sub = [4, 3];

Array.prototype.arrayContains = function(sub) {
  var self = this;
  var result = sub.filter(function(item) {
    return self.indexOf(item) > -1;
  });
  return sub.length === result.length;
}

alert(master.arrayContains(sub));