fix(Dialog): attach should work when showInAttachedElement is true

src/dialog/_example/attach.vue

@@ -49,6 +49,7 @@
     <t-dialog
       :visible.sync="visibleShowInAttachedElement"
       header="对话框仅展示在挂载元素区域"
+      attach=".dialog-attach-wrap"
       :showInAttachedElement="true"
       placement="center"
       :onConfirm="() => (this.visibleShowInAttachedElement = false)"

src/dialog/dialog.tsx

@@ -153,7 +153,7 @@ export default mixins(
       return !this.isFullScreen ? { width: getCSSValue(this.width), ...this.dialogStyle } : { ...this.dialogStyle }; // width全屏模式不生效;
     },
     computedAttach(): AttachNode {
-      return this.showInAttachedElement || this.isNormal ? undefined : this.attach || this.globalAttach();
+      return this.isNormal ? undefined : this.attach || this.globalAttach();
     },
   },
 

src/drawer/_example/attach-parent.vue

@@ -1,7 +1,14 @@
 <template>
   <div class="t-container">
     <div class="t-suf-container">
-      <t-drawer :visible.sync="visible" :placement="placement" :mode="mode" header="抽屉标题" showInAttachedElement>
+      <t-drawer
+        :visible.sync="visible"
+        :placement="placement"
+        :mode="mode"
+        header="抽屉标题"
+        showInAttachedElement
+        attach=".t-suf-container"
+      >
         <p>抽屉的内容</p>
       </t-drawer>
       <div class="tdesign-radio-button">

src/drawer/drawer.tsx

@@ -122,7 +122,7 @@ export default mixins(
       };
     },
     computedAttach(): AttachNode {
-      return this.showInAttachedElement ? undefined : this.attach || this.globalAttach();
+      return this.attach || this.globalAttach();
     },
   },