Avoiding to use Array.from

src/js/modules/webslides.js

@@ -141,7 +141,7 @@ export default class WebSlides {
    * @private
    */
   grabSlides_() {
-    this.slides = Array.from(this.el.childNodes)
+    this.slides = DOM.toArray(this.el.childNodes)
         .map((slide, i) => new Slide(slide, i));
 
     this.maxSlide_ = this.slides.length;

src/js/utils/dom.js

@@ -72,4 +72,13 @@ export default class DOM {
 
     target.dispatchEvent(event);
   }
+
+  /**
+   * Converts an iterable to an array.
+   * @param {*} iterable Element to convert to array
+   * @return {Array} the element casted to an array.
+   */
+  static toArray(iterable) {
+    return [].slice.call(iterable);
+  }
 }