JSFiddle - React, Tailwind, and code Playground

HTML

<script src="//ajax.googleapis.com/ajax/libs/jqueryui/1.9.2/jquery-ui.min.js"></script>
<script src="http://automattic.github.io/Iris/javascripts/iris.min.js"></script>

JavaScript

function isInArray(arr) {
    var match = [1, 2];
    var getArray = arr;

    for (var i = 0; i < match.length; i++) {
        if ($.inArray(match[i], getArray) == -1) {
            return false;
        }
    }
    return true;
}
alert(isInArray([1, 3, 4, 5, 2]));
alert(isInArray([1, 3, 4, 5]))