♻️(component): [dropdown]移除包装元素

package/component/src/component/cascader/index.less

@@ -21,6 +21,7 @@
 }
 
 .layui-cascader {
+  display: inline-block;
   &[size="lg"] {
     .set-size(@lg,@lg-width);
   }

package/component/src/component/cascader/index.vue

@@ -1,62 +1,64 @@
 <template>
-  <lay-dropdown
-    class="layui-cascader"
-    :class="{ 'layui-cascader-opend': openState }"
-    ref="dropdownRef"
-    :autoFitMinWidth="false"
-    :updateAtScroll="true"
-    :disabled="dropDownDisabled"
+  <div
     :size="size"
-    @open="openState = true"
-    @hide="openState = false"
+    :class="['layui-cascader', { 'layui-cascader-opend': openState }]"
   >
-    <lay-input
-      v-model="displayValue"
-      readonly
-      suffix-icon="layui-icon-triangle-d"
-      :placeholder="placeholder"
-      v-if="!slots.default"
-      :allow-clear="allowClear"
-      @clear="onClear"
-      :size="size"
-    ></lay-input>
-    <slot v-else></slot>
+    <lay-dropdown
+      ref="dropdownRef"
+      :autoFitMinWidth="false"
+      :updateAtScroll="true"
+      :disabled="dropDownDisabled"
+      @show="openState = true"
+      @hide="openState = false"
+    >
+      <lay-input
+        v-model="displayValue"
+        readonly
+        suffix-icon="layui-icon-triangle-d"
+        :placeholder="placeholder"
+        v-if="!slots.default"
+        :allow-clear="allowClear"
+        @clear="onClear"
+        :size="size"
+      ></lay-input>
+      <slot v-else></slot>
 
-    <template #content>
-      <div class="layui-cascader-panel">
-        <template v-for="(itemCol, index) in treeData">
-          <lay-scroll
-            height="180px"
-            class="layui-cascader-menu"
-            :key="'cascader-menu' + index"
-            v-if="itemCol.data.length"
-          >
-            <div
-              class="layui-cascader-menu-item"
-              v-for="(item, i) in itemCol.data"
-              :key="index + i"
-              @click="selectBar(item, i, index)"
-              :class="[
-                {
-                  'layui-cascader-selected': itemCol.selectIndex === i,
-                },
-              ]"
+      <template #content>
+        <div class="layui-cascader-panel">
+          <template v-for="(itemCol, index) in treeData">
+            <lay-scroll
+              height="180px"
+              class="layui-cascader-menu"
+              :key="'cascader-menu' + index"
+              v-if="itemCol.data.length"
             >
-              <slot
-                :name="item.slot"
-                v-if="item.slot && slots[item.slot]"
-              ></slot>
-              <template v-else>{{ item.label }}</template>
-              <i
-                class="layui-icon layui-icon-right"
-                v-if="item.children && item.children.length"
-              ></i>
-            </div>
-          </lay-scroll>
-        </template>
-      </div>
-    </template>
-  </lay-dropdown>
+              <div
+                class="layui-cascader-menu-item"
+                v-for="(item, i) in itemCol.data"
+                :key="index + i"
+                @click="selectBar(item, i, index)"
+                :class="[
+                  {
+                    'layui-cascader-selected': itemCol.selectIndex === i,
+                  },
+                ]"
+              >
+                <slot
+                  :name="item.slot"
+                  v-if="item.slot && slots[item.slot]"
+                ></slot>
+                <template v-else>{{ item.label }}</template>
+                <i
+                  class="layui-icon layui-icon-right"
+                  v-if="item.children && item.children.length"
+                ></i>
+              </div>
+            </lay-scroll>
+          </template>
+        </div>
+      </template>
+    </lay-dropdown>
+  </div>
 </template>
 
 <script lang="ts">

package/component/src/component/datePicker/index.vue

@@ -1,13 +1,13 @@
 <template>
-  <div>
+  <div
+    :class="['layui-date-picker', { 'layui-date-range-picker': range }]"
+    :size="size"
+  >
     <lay-dropdown
       ref="dropdownRef"
       :disabled="disabled"
       :autoFitMinWidth="false"
       updateAtScroll
-      class="layui-date-picker"
-      :class="{ 'layui-date-range-picker': range }"
-      :size="size"
     >
       <lay-input
         :name="name"

package/component/src/component/dropdown/index.vue

@@ -1,12 +1,25 @@
 <script lang="ts">
 export default {
   name: "LayDropdown",
+  inheritAttrs: false,
 };
 </script>
 
 <script setup lang="ts">
 import "./index.less";
-import { ComputedRef, CSSProperties, inject, reactive, Ref, toRefs } from "vue";
+import {
+  ComputedRef,
+  CSSProperties,
+  h,
+  inject,
+  reactive,
+  Ref,
+  toRefs,
+  useSlots,
+  Fragment,
+  cloneVNode,
+  useAttrs,
+} from "vue";
 import {
   computed,
   nextTick,
@@ -30,6 +43,8 @@ import {
   DropdownContext,
 } from "./interface";
 import TeleportWrapper from "../_components/teleportWrapper.vue";
+import { useFirstElement } from "./useFirstElement";
+import RenderFunction from "../_components/renderFunction";
 
 export type DropdownTrigger = "click" | "hover" | "focus" | "contextMenu";
 
@@ -75,13 +90,15 @@ const props = withDefaults(defineProps<LayDropdownProps>(), {
   alignPoint: false,
   popupContainer: "body",
 });
-
+const slots = useSlots();
+const attrs = useAttrs();
 const childrenRefs = new Set<Ref<HTMLElement>>();
 const dropdownCtx = inject<DropdownContext | undefined>(
   dropdownInjectionKey,
   undefined
 );
-const dropdownRef = shallowRef<HTMLElement | undefined>();
+const { children, firstElement: dropdownRef } = useFirstElement();
+//const dropdownRef = shallowRef<HTMLElement | undefined>();
 const contentRef = shallowRef<HTMLElement | undefined>();
 const contentStyle = ref<CSSProperties>({});
 const { width: windowWidth, height: windowHeight } = useWindowSize();
@@ -91,6 +108,7 @@ const mousePosition = reactive({
 });
 const { x: mouseLeft, y: mouseTop } = toRefs(mousePosition);
 const openState = ref(false);
+let scrollElements: HTMLElement[] | undefined;
 
 const containerRef = computed(() =>
   props.popupContainer
@@ -564,7 +582,28 @@ onClickOutside(
   }
 );
 
-let scrollElements: HTMLElement[] | undefined;
+const onlyChildRenderFunc = () => {
+  const slotContent = slots.default ? slots.default() : [];
+  const transformedSlotContent = slotContent.map((vnode) =>
+    cloneVNode(
+      vnode,
+      {
+        onClick: handleClick,
+        onContextmenu: handleContextMenuClick,
+        onMouseenter: handleMouseEnter,
+        onMouseleave: handleMouseLeave,
+        onFocusin: handleFocusin,
+        onFocusout: handleFocusout,
+        ...attrs,
+      },
+      true
+    )
+  );
+
+  children.value = transformedSlotContent;
+  return h(Fragment, children.value);
+};
+
 onMounted(() => {
   if (props.updateAtScroll) {
     scrollElements = getScrollElements(dropdownRef.value);
@@ -611,29 +650,20 @@ defineExpose({ show, hide, toggle });
 </script>
 
 <template>
-  <div
-    ref="dropdownRef"
-    class="layui-dropdown"
-    @mouseenter="handleMouseEnter"
-    @mouseleave="handleMouseLeave"
-    @focusin="handleFocusin()"
-    @focusout="handleFocusout()"
-    :class="{ 'layui-dropdown-up': openState }"
-  >
-    <div @click="handleClick" @contextmenu="handleContextMenuClick">
-      <slot></slot>
+  <RenderFunction
+    :renderFunc="onlyChildRenderFunc"
+    v-bind="$attrs"
+  ></RenderFunction>
+  <TeleportWrapper :to="popupContainer">
+    <div
+      v-if="openState"
+      ref="contentRef"
+      class="layui-dropdown-content layui-anim layui-anim-upbit"
+      :style="contentStyle"
+      @mouseenter="handleMouseEnterWithContext"
+      @mouseleave="handleMouseLeaveWithContext"
+    >
+      <slot name="content"></slot>
     </div>
-    <TeleportWrapper :to="popupContainer">
-      <dl
-        v-if="openState"
-        ref="contentRef"
-        class="layui-dropdown-content layui-anim layui-anim-upbit"
-        :style="contentStyle"
-        @mouseenter="handleMouseEnterWithContext"
-        @mouseleave="handleMouseLeaveWithContext"
-      >
-        <slot name="content"></slot>
-      </dl>
-    </TeleportWrapper>
-  </div>
+  </TeleportWrapper>
 </template>

package/component/src/component/dropdown/useFirstElement.ts

@@ -0,0 +1,103 @@
+import { Component, onMounted, onUpdated, ref, VNode, VNodeTypes } from "vue";
+
+export interface SlotChildren {
+  value?: VNode[];
+}
+
+// Quoted from arco-vue
+// https://github.com/arco-design/arco-design-vue/blob/main/packages/web-vue/components/_utils/vue-utils.ts
+export enum ShapeFlags {
+  ELEMENT = 1,
+  FUNCTIONAL_COMPONENT = 1 << 1,
+  STATEFUL_COMPONENT = 1 << 2,
+  COMPONENT = ShapeFlags.STATEFUL_COMPONENT | ShapeFlags.FUNCTIONAL_COMPONENT,
+  TEXT_CHILDREN = 1 << 3,
+  ARRAY_CHILDREN = 1 << 4,
+  SLOTS_CHILDREN = 1 << 5,
+  TELEPORT = 1 << 6,
+  SUSPENSE = 1 << 7,
+  COMPONENT_SHOULD_KEEP_ALIVE = 1 << 8,
+  COMPONENT_KEPT_ALIVE = 1 << 9,
+}
+
+export const isElement = (vn: VNode) => {
+  return Boolean(vn && vn.shapeFlag & ShapeFlags.ELEMENT);
+};
+
+export const isComponent = (
+  vn: VNode,
+  type?: VNodeTypes
+): type is Component => {
+  return Boolean(vn && vn.shapeFlag & ShapeFlags.COMPONENT);
+};
+
+export const isArrayChildren = (
+  vn: VNode,
+  children: VNode["children"]
+): children is VNode[] => {
+  return Boolean(vn && vn.shapeFlag & ShapeFlags.ARRAY_CHILDREN);
+};
+
+export const getChildrenArray = (vn: VNode): VNode[] | undefined => {
+  if (isArrayChildren(vn, vn.children)) {
+    return vn.children;
+  }
+  if (Array.isArray(vn)) {
+    return vn;
+  }
+  return undefined;
+};
+
+export const getFirstElementFromVNode = (
+  vn: VNode
+): HTMLElement | undefined => {
+  if (isElement(vn)) {
+    return vn.el as HTMLElement;
+  }
+  if (isComponent(vn)) {
+    if ((vn.el as Node)?.nodeType === 1) {
+      return vn.el as HTMLElement;
+    }
+    if (vn.component?.subTree) {
+      const ele = getFirstElementFromVNode(vn.component.subTree);
+      if (ele) return ele;
+    }
+  } else {
+    const children = getChildrenArray(vn);
+    return getFirstElementFromChildren(children);
+  }
+  return undefined;
+};
+
+export const getFirstElementFromChildren = (
+  children: VNode[] | undefined
+): HTMLElement | undefined => {
+  if (children && children.length > 0) {
+    for (const child of children) {
+      const element = getFirstElementFromVNode(child);
+      if (element) return element;
+    }
+  }
+  return undefined;
+};
+
+export const useFirstElement = () => {
+  const children: SlotChildren = {};
+  const firstElement = ref<HTMLElement>();
+
+  const getFirstElement = () => {
+    const element = getFirstElementFromChildren(children.value);
+    if (element !== firstElement.value) {
+      firstElement.value = element;
+    }
+  };
+
+  onMounted(() => getFirstElement());
+
+  onUpdated(() => getFirstElement());
+
+  return {
+    children,
+    firstElement,
+  };
+};

package/document-component/src/document/zh-CN/components/dropdown.md

@@ -478,7 +478,7 @@ export default {
 
 <template>
 <lay-space>
-   <lay-dropdown placement="bottom-left" autoFitWidth updateAtScroll>
+   <lay-dropdown placement="bottom-start" autoFitWidth updateAtScroll>
     <lay-button type="primary">autoFitWidth</lay-button>
     <template #content>
       <lay-dropdown-menu>
@@ -488,7 +488,7 @@ export default {
       </lay-dropdown-menu>
     </template>
   </lay-dropdown>
-  <lay-dropdown placement="bottom-left" :autoFitMinWidth="false" updateAtScroll>
+  <lay-dropdown placement="bottom-start" :autoFitMinWidth="false" updateAtScroll>
     <lay-button type="primary">关闭 autoFitMinWidth</lay-button>
     <template #content>
       <lay-dropdown-menu>
@@ -498,7 +498,7 @@ export default {
       </lay-dropdown-menu> 
     </template>
   </lay-dropdown>
-  <lay-dropdown placement="bottom-left" updateAtScroll>
+  <lay-dropdown placement="bottom-start" updateAtScroll>
     <lay-button type="primary">updateAtScroll</lay-button>
     <template #content>
       <lay-dropdown-menu>
@@ -508,7 +508,7 @@ export default {
       </lay-dropdown-menu> 
     </template>
   </lay-dropdown>
-  <lay-dropdown placement="bottom-left" updateAtScroll :contentOffset="8">
+  <lay-dropdown placement="bottom-start" updateAtScroll :contentOffset="8">
     <lay-button type="primary">contentOffset: 8px</lay-button>
     <template #content>
       <lay-dropdown-menu>