fixed a bug in Dropdown which caused an Error, except you are using jQuery. Especially the function getClosestAncestor(). See issue #43

Author: dwu300

js/dropdown.js

@@ -427,7 +427,9 @@
           if (alignments.spaceOnTop > alignments.spaceOnBottom) {
             verticalAlignment = 'bottom';
             idealHeight += alignments.spaceOnTop;
-            idealYPos -= this.options.coverTrigger ? alignments.spaceOnTop - 20 : alignments.spaceOnTop - 20 + triggerBRect.height;
+            idealYPos -= this.options.coverTrigger
+              ? alignments.spaceOnTop - 20
+              : alignments.spaceOnTop - 20 + triggerBRect.height;
           } else {
             idealHeight += alignments.spaceOnBottom;
           }
@@ -527,8 +529,25 @@
      * Place dropdown
      */
     _placeDropdown() {
+      /**
+       * Get closest ancestor that satisfies the condition
+       * @param {Element} el  Element to find ancestors on
+       * @param {Function} condition  Function that given an ancestor element returns true or false
+       * @returns {Element} Return closest ancestor or null if none satisfies the condition
+       */
+      const getClosestAncestor = function(el, condition) {
+        let ancestor = el.parentNode;
+        while (ancestor !== null && !$(ancestor).is(document)) {
+          if (condition(ancestor)) {
+            return ancestor;
+          }
+          ancestor = ancestor.parentNode;
+        }
+        return null;
+      };
+
       // Container here will be closest ancestor with overflow: hidden
-      let closestOverflowParent = M.getClosestAncestor(this.dropdownEl, (ancestor) => {
+      let closestOverflowParent = getClosestAncestor(this.dropdownEl, (ancestor) => {
         return $(ancestor).css('overflow') !== 'visible';
       });
       // Fallback

js/global.js

@@ -167,36 +167,6 @@ M.escapeHash = function(hash) {
   return hash.replace(/(:|\.|\[|\]|,|=|\/)/g, '\\$1');
 };
 
-/**
- * Get closest ancestor that satisfies the condition
- * @param {Element} el  Element to find ancestors on
- * @param {Function} condition  Function that given an ancestor element returns true or false
- * @returns {Element} Return closest ancestor or null if none satisfies the condition
- */
-M.getClosestAncestor = function(el, condition) {
-  let ancestor = el.parentNode;
-  while (ancestor !== null && !$(ancestor).is(document)) {
-    if (condition(ancestor)) {
-      return ancestor;
-    }
-    ancestor = ancestor.parentNode;
-  }
-  return null;
-};
-
-M.elementOrParentIsFixed = function(element) {
-  let $element = $(element);
-  let $checkElements = $element.add($element.parents());
-  let isFixed = false;
-  $checkElements.each(function() {
-    if ($(this).css('position') === 'fixed') {
-      isFixed = true;
-      return false;
-    }
-  });
-  return isFixed;
-};
-
 /**
  * @typedef {Object} Edges
  * @property {Boolean} top  If the top edge was exceeded