feat: dialog add getDialogWrap

Author: tangjinzhou

components/config-provider/index.en-US.md

@@ -12,8 +12,8 @@ This component provides a configuration to all Vue components underneath itself
   export default {
     methods: {
       getPopupContainer(el, dialogContext) {
-        if(dialogContext) {
-          return dialogContext.$refs.wrap;
+        if (dialogContext) {
+          return dialogContext.getDialogWrap();
         } else {
           return document.body;
         }

components/config-provider/index.zh-CN.md

@@ -12,8 +12,8 @@ ConfigProvider 使用 Vue 的 [provide / inject](https://vuejs.org/v2/api/#provi
   export default {
     methods: {
       getPopupContainer(el, dialogContext) {
-        if(dialogContext) {
-          return dialogContext.$refs.wrap;
+        if (dialogContext) {
+          return dialogContext.getDialogWrap();
         } else {
           return document.body;
         }

components/vc-dialog/Dialog.jsx

@@ -112,6 +112,10 @@ export default {
     clearTimeout(this.timeoutId);
   },
   methods: {
+    // 对外暴露的 api 不要更改名称或删除
+    getDialogWrap() {
+      return this.$refs.wrap;
+    },
     updatedCallback(visible) {
       const mousePosition = this.mousePosition;
       if (this.visible) {