Vue电商网站首页内容吸顶功能实现过程

<script lang="ts" setup name="AppHeaderSticky">
import AppHeaderNav from './app-header-nav.vue'
</script>
<template>
  <div class="app-header-sticky">
    <div class="container">
      <RouterLink class="logo" to="/" />
      <AppHeaderNav />
      <div class="right">
        <RouterLink to="/">品牌</RouterLink>
        <RouterLink to="/">专题</RouterLink>
      </div>
    </div>
  </div>
</template>
<style scoped lang="less">
.app-header-sticky {
  width: 100%;
  height: 80px;
  position: fixed;
  left: 0;
  top: 0;
  z-index: 999;
  background-color: #fff;
  border-bottom: 1px solid #e4e4e4;
  .container {
    display: flex;
    align-items: center;
  }
  .logo {
    width: 200px;
    height: 80px;
    background: url(@/assets/images/logo.png) no-repeat right 2px;
    background-size: 160px auto;
  }
  .right {
    width: 220px;
    display: flex;
    text-align: center;
    padding-left: 40px;
    border-left: 2px solid @xtxColor;
    a {
      width: 38px;
      margin-right: 40px;
      font-size: 16px;
      line-height: 1;
      &:hover {
        color: @xtxColor;
      }
    }
  }
}
</style>

<script lang="ts" setup>
import AppTopnav from './components/app-topnav.vue'
import AppHeader from './components/app-header.vue'
import AppFooter from './components/app-footer.vue'
+import AppHeaderSticky from './components/app-header-sticky.vue'
</script>
<template>
  <AppTopnav></AppTopnav>
  <AppHeader></AppHeader>
+  <AppHeaderSticky></AppHeaderSticky>
  <div class="app-body">
    <!-- 路由出口 -->
    <RouterView></RouterView>
  </div>
  <AppFooter></AppFooter>
</template>
<style lang="less" scoped>
.app-body {
  min-height: 600px;
}
</style>

.app-header-sticky {
  width: 100%;
  height: 80px;
  position: fixed;
  left: 0;
  top: 0;
  z-index: 999;
  background-color: #fff;
  border-bottom: 1px solid #e4e4e4;
+  transform: translateY(-100%);
+  &.show {
+    transition: all 0.3s linear;
+    transform: translateY(0%);
+  }

<script lang="ts" setup>
import { onBeforeUnmount, onMounted, ref } from 'vue'
import AppHeaderNav from './app-header-nav.vue'
const y = ref(0)
const onScroll = () => {
  y.value = document.documentElement.scrollTop
}
onMounted(() => {
  window.addEventListener('scroll', onScroll)
})
onBeforeUnmount(() => {
  window.removeEventListener('scroll', onScroll)
})
</script>

<div class="app-header-sticky" :class="{show:y >= 78}">

<div class="container" v-show="y >= 78">

<script lang="ts" setup>
import AppHeaderNav from './app-header-nav.vue'
// import { onBeforeUnmount, onMounted, ref } from 'vue'
import { useWindowScroll } from '@vueuse/core'
// const y = ref(0)
// const onScroll = () => {
//   y.value = document.documentElement.scrollTop
// }
// onMounted(() => {
//   window.addEventListener('scroll', onScroll)
// })
// onBeforeUnmount(() => {
//   window.removeEventListener('scroll', onScroll)
// })
// 控制是否显示吸顶组件
const { y } = useWindowScroll()
</script>