diff --git a/packages/common/Cascader/src/Cascader.vue b/packages/common/Cascader/src/Cascader.vue
index 3313907ec..5c210d7e0 100644
--- a/packages/common/Cascader/src/Cascader.vue
+++ b/packages/common/Cascader/src/Cascader.vue
@@ -37,53 +37,50 @@
       @delete-last-option="handleDeleteLastOption"
       @pattern-input="handlePatternInput"
     />
-    <div
-      ref="contentContainer"
-      class="n-detached-content-container n-cascader-detached-content-container"
-      :class="{
-        [namespace]: namespace
-      }"
-    >
-      <n-base-portal ref="portal1">
-        <cascader-menu
-          ref="menu1"
-          v-clickoutside="handleMenuClickOutside"
-          :active="active && !selectMenuActive"
-          :class="{
-            [`n-${synthesizedTheme}-theme`]: synthesizedTheme
-          }"
-          :type="type"
-          :value="value"
-          :multiple="multiple"
-          :options="menuOptions"
-          :pattern="pattern"
-          :filterable="filterable"
-          :expand-trigger="expandTrigger"
-          :active-id.sync="activeId"
-          :lazy="lazy"
-          :on-load="onLoad"
-          :patches.sync="patches"
-          :loading.sync="loading"
-          :loading-id.sync="loadingId"
-          :theme="synthesizedTheme"
-          @input="handleMenuInput"
-        />
-      </n-base-portal>
-      <n-base-portal ref="portal2">
-        <cascader-select-menu
-          ref="menu2"
-          :type="type"
-          :value="value"
-          :active="active && selectMenuActive"
-          :theme="synthesizedTheme"
-          :pattern="pattern"
-          :size="size"
-          :multiple="multiple"
-          :options="menuOptions"
-          @input="handleMenuInput"
-        />
-      </n-base-portal>
-    </div>
+
+    <n-base-portal ref="portal1">
+      <cascader-menu
+        ref="menu1"
+        v-clickoutside="handleMenuClickOutside"
+        :active="active && !selectMenuActive"
+        :class="{
+          [`n-${synthesizedTheme}-theme`]: synthesizedTheme,
+          [namespace]: namespace
+        }"
+        :type="type"
+        :value="value"
+        :multiple="multiple"
+        :options="menuOptions"
+        :pattern="pattern"
+        :filterable="filterable"
+        :expand-trigger="expandTrigger"
+        :active-id.sync="activeId"
+        :lazy="lazy"
+        :on-load="onLoad"
+        :patches.sync="patches"
+        :loading.sync="loading"
+        :loading-id.sync="loadingId"
+        :theme="synthesizedTheme"
+        @input="handleMenuInput"
+      />
+    </n-base-portal>
+    <n-base-portal ref="portal2">
+      <cascader-select-menu
+        ref="menu2"
+        :class="{
+          [namespace]: namespace
+        }"
+        :type="type"
+        :value="value"
+        :active="active && selectMenuActive"
+        :theme="synthesizedTheme"
+        :pattern="pattern"
+        :size="size"
+        :multiple="multiple"
+        :options="menuOptions"
+        @input="handleMenuInput"
+      />
+    </n-base-portal>
   </div>
 </template>
 
diff --git a/packages/common/Modal/src/Modal.vue b/packages/common/Modal/src/Modal.vue
index e57666d9a..d57b1b424 100644
--- a/packages/common/Modal/src/Modal.vue
+++ b/packages/common/Modal/src/Modal.vue
@@ -41,6 +41,7 @@ export default {
       type: Boolean,
       default: true
     },
+    /** to make zindexable work */
     detached: {
       type: Boolean,
       default: true
diff --git a/packages/common/Popover/src/PopoverContent.js b/packages/common/Popover/src/PopoverContent.js
index 2df98f030..5299eee7a 100644
--- a/packages/common/Popover/src/PopoverContent.js
+++ b/packages/common/Popover/src/PopoverContent.js
@@ -66,10 +66,6 @@ export default {
       type: String,
       default: undefined
     },
-    detached: {
-      type: Boolean,
-      default: true
-    },
     overlayClass: {
       type: String,
       default: null
@@ -77,6 +73,11 @@ export default {
     overlayStyle: {
       type: Object,
       default: undefined
+    },
+    /** to make zindexable work */
+    detached: {
+      type: Boolean,
+      default: true
     }
   },
   mixins: [withapp, themeable, asthemecontext, placeable, zindexable],
diff --git a/packages/common/Select/src/Select.vue b/packages/common/Select/src/Select.vue
index d7c42bc90..43d90342c 100644
--- a/packages/common/Select/src/Select.vue
+++ b/packages/common/Select/src/Select.vue
@@ -325,7 +325,7 @@ export default {
     },
     handlePickerBlur () {
       this.$emit('blur', this.value)
-      // this.closeMenu()
+      this.closeMenu()
     },
     handleClickOutsideMenu (e) {
       if (this.active) {
diff --git a/packages/common/TimePicker/src/main.vue b/packages/common/TimePicker/src/main.vue
index 0f37d6cb8..2a38937a1 100644
--- a/packages/common/TimePicker/src/main.vue
+++ b/packages/common/TimePicker/src/main.vue
@@ -29,7 +29,7 @@
     >
       <div
         ref="content"
-        class="n-detached-content"
+        class="n-positioning-content"
       >
         <transition name="n-time-picker--transition">
           <div