Code cleanup: Remove obsolete IE JS polyfills

js/utils.js

@@ -1,122 +1,5 @@
 // Some general purpose JS functions for the iTop application
 
-//IE 8 compatibility, copied from: https://developer.mozilla.org/en-US/docs/JavaScript/Reference/Global_Objects/Array/IndexOf
-if (!Array.prototype.indexOf) {
-
-	if (false) // deactivated since it causes troubles: for(k in aData) => returns the indexOf function as first element on empty arrays !
-	{
-		Array.prototype.indexOf = function (searchElement /*, fromIndex */) {
-			"use strict";
-			if (this == null) {
-				throw new TypeError();
-			}
-			var t = Object(this);
-			var len = t.length >>> 0;
-			if (len === 0) {
-				return -1;
-			}
-			var n = 0;
-			if (arguments.length > 1) {
-				n = Number(arguments[1]);
-				if (n != n) { // shortcut for verifying if it's NaN
-					n = 0;
-				} else if (n != 0 && n != Infinity && n != -Infinity) {
-					n = (n > 0 || -1) * Math.floor(Math.abs(n));
-				}
-			}
-			if (n >= len) {
-				return -1;
-			}
-			var k = n >= 0 ? n : Math.max(len-Math.abs(n), 0);
-			for (; k < len; k++) {
-				if (k in t && t[k] === searchElement) {
-					return k;
-				}
-			}
-			return -1;
-		}
-	}
-}
-// Polyfill for Array.from for IE
-// Copied from https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/from
-if (!Array.from) {
-  Array.from = (function () {
-    var toStr = Object.prototype.toString;
-    var isCallable = function (fn) {
-      return typeof fn === 'function' || toStr.call(fn) === '[object Function]';
-    };
-    var toInteger = function (value) {
-      var number = Number(value);
-      if (isNaN(number)) { return 0; }
-      if (number === 0 || !isFinite(number)) { return number; }
-      return (number > 0 ? 1 : -1) * Math.floor(Math.abs(number));
-    };
-    var maxSafeInteger = Math.pow(2, 53) - 1;
-    var toLength = function (value) {
-      var len = toInteger(value);
-      return Math.min(Math.max(len, 0), maxSafeInteger);
-    };
-
-    // The length property of the from method is 1.
-    return function from(arrayLike/*, mapFn, thisArg */) {
-      // 1. Let C be the this value.
-      var C = this;
-
-      // 2. Let items be ToObject(arrayLike).
-      var items = Object(arrayLike);
-
-      // 3. ReturnIfAbrupt(items).
-      if (arrayLike == null) {
-        throw new TypeError('Array.from requires an array-like object - not null or undefined');
-      }
-
-      // 4. If mapfn is undefined, then let mapping be false.
-      var mapFn = arguments.length > 1 ? arguments[1] : void undefined;
-      var T;
-      if (typeof mapFn !== 'undefined') {
-        // 5. else
-        // 5. a If IsCallable(mapfn) is false, throw a TypeError exception.
-        if (!isCallable(mapFn)) {
-          throw new TypeError('Array.from: when provided, the second argument must be a function');
-        }
-
-        // 5. b. If thisArg was supplied, let T be thisArg; else let T be undefined.
-        if (arguments.length > 2) {
-          T = arguments[2];
-        }
-      }
-
-      // 10. Let lenValue be Get(items, "length").
-      // 11. Let len be ToLength(lenValue).
-      var len = toLength(items.length);
-
-      // 13. If IsConstructor(C) is true, then
-      // 13. a. Let A be the result of calling the [[Construct]] internal method 
-      // of C with an argument list containing the single item len.
-      // 14. a. Else, Let A be ArrayCreate(len).
-      var A = isCallable(C) ? Object(new C(len)) : new Array(len);
-
-      // 16. Let k be 0.
-      var k = 0;
-      // 17. Repeat, while k < len… (also steps a - h)
-      var kValue;
-      while (k < len) {
-        kValue = items[k];
-        if (mapFn) {
-          A[k] = typeof T === 'undefined' ? mapFn(kValue, k) : mapFn.call(T, kValue, k);
-        } else {
-          A[k] = kValue;
-        }
-        k += 1;
-      }
-      // 18. Let putStatus be Put(A, "length", len, true).
-      A.length = len;
-      // 20. Return A.
-      return A;
-    };
-  }());
-}
-
 /**
  * Reload a truncated list
  */