title: Alternative or polyfill for Array.from on the Internet Explorer
body: <p>I have a problem with my Angular App on the Internet Explorer. It runs everywhere without a problem (Chrome, Mozilla, Edge), but <em><strong>NOT</strong></em> on the IE.</p>
  <p>I have analyzed with the Developer Explorer where the error is and it returned that the error occurs on the following line:</p>
  <p><code>myDataSet[index - 1].data = Array.from(tmp);</code></p>
  <p>Where this is the following error message I am getting:</p>
  <blockquote>
  <p>Object does not support property or method from at Anonymous function....(etc.)</p>
  </blockquote>
  <p>What I am doing there is that I have a <code>Set()</code> named <code>tmp</code> which contains the following data:</p>
  <p><a href="https://i.stack.imgur.com/gj5da.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/gj5da.png" alt="enter image description here" /></a></p>
  <p>Afterwards I am simply creating a simple array object from this <code>Set</code>.</p>
  <p>How can I solve this problem?</p>
  <p><strong>EDIT</strong></p>
  <p>Based on the recommendations I have added the following code to my App:</p>
  <pre><code>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 &gt; 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(&quot;Array.from requires an array-like object - not null or undefined&quot;);
        }
  
        // 4. If mapfn is undefined, then let mapping be false.
        var mapFn = arguments.length &gt; 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 &gt; 2) {
            T = arguments[2];
          }
        }
  
        // 10. Let lenValue be Get(items, &quot;length&quot;).
        // 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 &lt; len… (also steps a - h)
        var kValue;
        while (k &lt; 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, &quot;length&quot;, len, true).
        A.length = len;
        // 20. Return A.
        return A;
      };
    }());
  }
  </code></pre>