padl/dist/lib/includes.js

Develop pattern libraries with lit-element

"use strict";

(function () {
  ![].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(fromIndex) || 0;
    var k;

    for (n >= 0 ? k = n : (k = len + n, k < 0 && (k = 0)); k < len;) {
      var currentElement = O[k];
      if (searchElement === currentElement || searchElement !== searchElement && currentElement !== currentElement) return true;
      k++;
    }

    return false;
  });
})();