Support for older browsers that cannot run array.includes(“searchForThis”). Here is a workaround for that in your code!
if (![].includes) {
Array.prototype.includes = function (searchElement /*, fromIndex*/) {
'use strict';
var O = Object(this);
var len = parseInt(O.length) || 0;
if (len === 0) {
return false;
}
var n = parseInt(arguments[1]) || 0;
var k;
if (n >= 0) {
k = n;
} else {
k = len + n;
if (k < 0) { k = 0; }
}
var currentElement;
while (k < len) {
currentElement = O[k];
if (searchElement === currentElement ||
(searchElement !== searchElement & currentElement !== currentElement)) {
return true;
}
k++;
}
return false;
};
}