perf: 优化导航菜单动效执行性能

src/layouts/components/Menu/sub.vue

@@ -22,106 +22,107 @@ const rootMenu = inject(rootMenuInjectionKey)!
 
 const index = props.menu.path ?? rootMenu.getUseId(props.menu)
 
-const opened = computed(() => {
-  return rootMenu.openedMenus.includes(props.uniqueKey.at(-1)!)
-})
+const opened = computed(() => rootMenu.openedMenus.includes(props.uniqueKey.at(-1)!))
 
 const transitionEvent = computed(() => {
-  return rootMenu.isMenuPopup
-    ? {
-        enter(el: HTMLElement) {
-          if (el.offsetHeight > window.innerHeight) {
-            el.style.height = `${window.innerHeight}px`
-          }
-        },
-        afterEnter: () => {},
-        beforeLeave: (el: HTMLElement) => {
-          el.style.maxHeight = `${el.offsetHeight}px`
-          el.style.overflow = 'hidden'
-        },
-        leave: (el: HTMLElement) => {
-          el.style.maxHeight = '0'
-        },
-        afterLeave(el: HTMLElement) {
-          el.style.maxHeight = ''
-          el.style.overflow = ''
-        },
-      }
-    : CSS.supports('height', 'calc-size(auto, size)')
-      ? {}
-      : {
-          enter(el: HTMLElement) {
-            requestAnimationFrame(() => {
-              el.dataset.height = el.offsetHeight.toString()
-              el.style.maxHeight = '0'
-              void el.offsetHeight
-              el.style.maxHeight = `${el.dataset.height}px`
-              el.style.overflow = 'hidden'
-            })
-          },
-          afterEnter(el: HTMLElement) {
-            el.style.maxHeight = ''
-            el.style.overflow = ''
-          },
-          enterCancelled(el: HTMLElement) {
-            el.style.maxHeight = ''
-            el.style.overflow = ''
-          },
-          beforeLeave(el: HTMLElement) {
-            el.style.maxHeight = `${el.offsetHeight}px`
-            el.style.overflow = 'hidden'
-          },
-          leave(el: HTMLElement) {
-            el.style.maxHeight = '0'
-          },
-          afterLeave(el: HTMLElement) {
-            el.style.maxHeight = ''
-            el.style.overflow = ''
-          },
-          leaveCancelled(el: HTMLElement) {
-            el.style.maxHeight = ''
-            el.style.overflow = ''
-          },
+  if (rootMenu.isMenuPopup) {
+    return {
+      enter(el: HTMLElement) {
+        if (el.offsetHeight > window.innerHeight) {
+          el.style.height = `${window.innerHeight}px`
         }
+      },
+      afterEnter: () => {},
+      beforeLeave: (el: HTMLElement) => {
+        el.style.maxHeight = `${el.offsetHeight}px`
+        el.style.overflow = 'hidden'
+      },
+      leave: (el: HTMLElement) => {
+        el.style.maxHeight = '0'
+      },
+      afterLeave(el: HTMLElement) {
+        el.style.maxHeight = ''
+        el.style.overflow = ''
+      },
+    }
+  }
+  if (CSS.supports('height', 'calc-size(auto, size)')) {
+    return {}
+  }
+  return {
+    enter(el: HTMLElement) {
+      requestAnimationFrame(() => {
+        el.dataset.height = el.offsetHeight.toString()
+        el.style.maxHeight = '0'
+        void el.offsetHeight
+        el.style.maxHeight = `${el.dataset.height}px`
+        el.style.overflow = 'hidden'
+      })
+    },
+    afterEnter(el: HTMLElement) {
+      el.style.maxHeight = ''
+      el.style.overflow = ''
+    },
+    enterCancelled(el: HTMLElement) {
+      el.style.maxHeight = ''
+      el.style.overflow = ''
+    },
+    beforeLeave(el: HTMLElement) {
+      el.style.maxHeight = `${el.offsetHeight}px`
+      el.style.overflow = 'hidden'
+    },
+    leave(el: HTMLElement) {
+      el.style.maxHeight = '0'
+    },
+    afterLeave(el: HTMLElement) {
+      el.style.maxHeight = ''
+      el.style.overflow = ''
+    },
+    leaveCancelled(el: HTMLElement) {
+      el.style.maxHeight = ''
+      el.style.overflow = ''
+    },
+  }
 })
 
 const transitionClass = computed(() => {
-  return rootMenu.isMenuPopup
-    ? {
-        enterActiveClass: 'ease-in-out duration-300',
-        enterFromClass: 'opacity-0 translate-x-4',
-        enterToClass: 'opacity-100',
-        leaveActiveClass: 'ease-in-out duration-300',
-        leaveFromClass: 'opacity-100',
-        leaveToClass: 'opacity-0',
-      }
-    : {
-        enterActiveClass: 'ease-in-out duration-300',
-        enterFromClass: cn('opacity-0 translate-y-4 scale-95 blur-4', CSS.supports('height', 'calc-size(auto, size)') && 'h-0'),
-        enterToClass: 'opacity-100 translate-y-0 scale-100 blur-0',
-        leaveActiveClass: 'ease-in-out duration-300',
-        leaveFromClass: 'opacity-100 translate-y-0 scale-100 blur-0',
-        leaveToClass: cn('opacity-0 translate-y-4 scale-95 blur-4', CSS.supports('height', 'calc-size(auto, size)') && 'h-0'),
-      }
+  if (rootMenu.isMenuPopup) {
+    return {
+      enterActiveClass: 'ease-in-out duration-300',
+      enterFromClass: 'opacity-0 translate-x-4',
+      enterToClass: 'opacity-100',
+      leaveActiveClass: 'ease-in-out duration-300',
+      leaveFromClass: 'opacity-100',
+      leaveToClass: 'opacity-0',
+    }
+  }
+  return {
+    enterActiveClass: 'ease-in-out duration-300',
+    enterFromClass: cn('opacity-0 translate-y-4 scale-95 blur-4', CSS.supports('height', 'calc-size(auto, size)') && 'h-0'),
+    enterToClass: 'opacity-100 translate-y-0 scale-100 blur-0',
+    leaveActiveClass: 'ease-in-out duration-300',
+    leaveFromClass: 'opacity-100 translate-y-0 scale-100 blur-0',
+    leaveToClass: cn('opacity-0 translate-y-4 scale-95 blur-4', CSS.supports('height', 'calc-size(auto, size)') && 'h-0'),
+  }
 })
 
-const hasChildren = computed(() => {
-  return props.menu.children?.some((item: any) => item.meta?.menu !== false) ?? false
-})
+const hasChildren = computed(() => props.menu.children?.some((item: any) => item.meta?.menu !== false) ?? false)
 
 function handleClick() {
-  if (rootMenu.isMenuPopup && hasChildren.value) {
+  if (
+    (rootMenu.isMenuPopup && hasChildren.value)
+    || props.menu.meta?.link
+  ) {
     return
   }
-  if (props.menu.meta?.link) {
-    return
-  }
-  if (hasChildren.value) {
-    rootMenu.handleSubMenuClick(index, props.uniqueKey)
-  }
-  else {
-    rootMenu.handleMenuItemClick(index)
-  }
+  requestAnimationFrame(() => {
+    if (hasChildren.value) {
+      rootMenu.handleSubMenuClick(index, props.uniqueKey)
+    }
+    else {
+      rootMenu.handleMenuItemClick(index)
+    }
+  })
 }
 
 let timeout: (() => void) | undefined
@@ -136,32 +137,44 @@ function handleMouseenter() {
     if (hasChildren.value) {
       rootMenu.openMenu(index, props.uniqueKey)
       nextTick(() => {
-        const el = itemRef.value?.ref
-        const subMenuEl = subMenuRef.value?.$el
-        if (!el || !subMenuEl) {
-          return
-        }
-        let top = 0
-        let left = 0
-        if (rootMenu.props.mode === 'vertical' || props.level !== 0) {
-          top = el.getBoundingClientRect().top + el.scrollTop
-          left = el.getBoundingClientRect().left + el.getBoundingClientRect().width
-          if (top + subMenuEl.offsetHeight > window.innerHeight) {
-            top = Math.max(0, window.innerHeight - subMenuEl.offsetHeight)
+        requestAnimationFrame(() => {
+          const el = itemRef.value?.ref
+          const subMenuEl = subMenuRef.value?.$el
+          if (!el || !subMenuEl) {
+            return
           }
-        }
-        else {
-          top = el.getBoundingClientRect().top + el.getBoundingClientRect().height
-          left = el.getBoundingClientRect().left
-          if (top + subMenuEl.offsetHeight > window.innerHeight) {
-            subMenuEl.style.height = `${window.innerHeight - top}px`
+          const rect = el.getBoundingClientRect()
+          const { top, left, width, height } = rect
+          let menuTop = 0
+          let menuLeft = 0
+          if (rootMenu.props.mode === 'vertical' || props.level !== 0) {
+            menuTop = top + el.scrollTop
+            menuLeft = left + width
+            // 处理边界情况
+            if (menuTop + subMenuEl.offsetHeight > window.innerHeight) {
+              menuTop = Math.max(0, window.innerHeight - subMenuEl.offsetHeight)
+            }
           }
-        }
-        if (left + subMenuEl.offsetWidth > document.documentElement.clientWidth) {
-          left = el.getBoundingClientRect().left - el.getBoundingClientRect().width
-        }
-        subMenuEl.style.top = `${top}px`
-        subMenuEl.style.insetInlineStart = `${left}px`
+          else {
+            menuTop = top + height
+            menuLeft = left
+            // 处理边界情况
+            if (menuTop + subMenuEl.offsetHeight > window.innerHeight) {
+              subMenuEl.style.height = `${window.innerHeight - menuTop}px`
+            }
+          }
+          // 处理边界情况
+          if (menuLeft + subMenuEl.offsetWidth > document.documentElement.clientWidth) {
+            menuLeft = left - width
+          }
+          // 设置样式
+          Object.assign(subMenuEl.style, {
+            top: `${menuTop}px`,
+            insetInlineStart: `${menuLeft}px`,
+            willChange: 'transform',
+            transform: 'translateZ(0)',
+          })
+        })
       })
     }
     else {
@@ -178,14 +191,16 @@ function handleMouseleave() {
   rootMenu.mouseInMenu = []
   timeout?.()
   ;({ stop: timeout } = useTimeoutFn(() => {
-    if (rootMenu.mouseInMenu.length === 0) {
-      rootMenu.closeMenu(props.uniqueKey)
-    }
-    else {
-      if (hasChildren.value) {
-        !rootMenu.mouseInMenu.includes(props.uniqueKey.at(-1)!) && rootMenu.closeMenu(props.uniqueKey.at(-1)!)
+    requestAnimationFrame(() => {
+      if (rootMenu.mouseInMenu.length === 0) {
+        rootMenu.closeMenu(props.uniqueKey)
       }
-    }
+      else {
+        if (hasChildren.value) {
+          !rootMenu.mouseInMenu.includes(props.uniqueKey.at(-1)!) && rootMenu.closeMenu(props.uniqueKey.at(-1)!)
+        }
+      }
+    })
   }, 300))
 }
 </script>
@@ -195,7 +210,7 @@ function handleMouseleave() {
   <Teleport v-if="hasChildren" to="body" :disabled="!rootMenu.isMenuPopup">
     <Transition v-bind="transitionClass" v-on="transitionEvent">
       <FaScrollArea
-        v-if="opened" ref="subMenuRef" :scrollbar="false" :mask="rootMenu.isMenuPopup" :class="cn('sub-menu static h-[calc-size(auto,size)] rounded-lg', {
+        v-if="opened" ref="subMenuRef" :scrollbar="false" :mask="rootMenu.isMenuPopup" :class="cn('sub-menu static h-[calc-size(auto,size)] rounded-lg will-change-transform', {
           'bg-[var(--g-sub-sidebar-bg)]': rootMenu.isMenuPopup,
           'border shadow-xl fixed z-3000 w-[200px]': rootMenu.isMenuPopup,
           'mx-1': rootMenu.isMenuPopup && (rootMenu.props.mode === 'vertical' || level !== 0),