Merge pull request #2994 from jcamejo/remove-children-validation Fixes #2940

Remove children validation

src/dom_components/model/Components.js

@@ -22,11 +22,17 @@ export default Backbone.Collection.extend({
   },
 
   removeChildren(removed, coll, opts = {}) {
+    // Removing a parent component can cause this function
+    // to be called with an already removed child element
+    if (!removed) {
+      return;
+    }
+
     const { domc, em } = this;
     const allByID = domc ? domc.allById() : {};
 
     if (!opts.temporary) {
-      // Remove the component from the gloabl list
+      // Remove the component from the global list
       const id = removed.getId();
       const sels = em.get('SelectorManager').getAll();
       const rules = em.get('CssComposer').getAll();