fix getting defaultView from this.editor

src/component/base/DraftEditor.react.js

@@ -447,13 +447,11 @@ class DraftEditor extends React.Component<DraftEditorProps, State> {
     if (isIE) {
       // editor can be null after mounting
       // https://stackoverflow.com/questions/44074747/componentdidmount-called-before-ref-callback
-
-      const castedEditor: HTMLElement = (this.editor: any);
-      (castedEditor ? castedEditor.editor.ownerDocument : global).execCommand(
-        'AutoUrlDetect',
-        false,
-        false,
-      );
+      if (!this.editor) {
+        global.execCommand('AutoUrlDetect', false, false);
+      } else {
+        this.editor.ownerDocument.execCommand('AutoUrlDetect', false, false);
+      }
     }
   }
 

src/component/handlers/edit/editOnInput.js

@@ -46,8 +46,8 @@ function editOnInput(editor: DraftEditor): void {
     editor._pendingStateFromBeforeInput = undefined;
   }
   // at this point editor is not null for sure (after input)
-  const castedEditorElement: HTMLElement = (editor: any);
-  const domSelection = castedEditorElement.editor.ownerDocument.defaultView.getSelection();
+  const castedEditorElement: HTMLElement = (editor.editor: any);
+  const domSelection = castedEditorElement.ownerDocument.defaultView.getSelection();
 
   const {anchorNode, isCollapsed} = domSelection;
   const isNotTextNode = anchorNode.nodeType !== Node.TEXT_NODE;