fix(Popup): may throw error when using get-container and destroyed

src/mixins/popup/index.js

@@ -1,10 +1,16 @@
+// Context
 import { context } from './context';
+import { openOverlay, closeOverlay, updateOverlay } from './overlay';
+
+// Utils
+import { on, off, preventDefault } from '../../utils/dom/event';
+import { removeNode } from '../../utils/dom/node';
+import { getScroller } from '../../utils/dom/scroll';
+
+// Mixins
 import { TouchMixin } from '../touch';
 import { PortalMixin } from '../portal';
 import { CloseOnPopstateMixin } from '../close-on-popstate';
-import { on, off, preventDefault } from '../../utils/dom/event';
-import { openOverlay, closeOverlay, updateOverlay } from './overlay';
-import { getScroller } from '../../utils/dom/scroll';
 
 export const popupMixinProps = {
   // whether to show popup
@@ -90,8 +96,8 @@ export function PopupMixin(options = {}) {
     beforeDestroy() {
       this.close();
 
-      if (this.getContainer && this.$parent && this.$parent.$el) {
-        this.$parent.$el.appendChild(this.$el);
+      if (this.getContainer) {
+        removeNode(this.$el);
       }
     },