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11.Layout-Pinia优化重复请求

news 2025/8/2 15:38:34

如何优化

先渲染一下结构：

<script setup>
//vueUseimport {getCategoryAPI} from '@/api/category'
import {onMounted,ref} from 'vue'
import {useScroll} from '@vueuse/core'const categoryList = ref([])
const getCategoryAPI = async() => {const res = await getCategoryAPI() categoryList.value = res.result
}onMounted(() =>{ getCategoryAPI()
})const {y} = useScroll(window)
</script><template><div class="app-header-sticky"><div class="container"><RouterLink class="logo" to="/" /><!-- 导航区域 --><ul class="app-header-nav "><li class="home"><RouterLink to="/">首页</RouterLink></li><li><li class="home" v-for="item in categoryList><RouterLink to ="/">{{item.name}}</RouterLink></li></ul><div class="right"><RouterLink to="/">品牌</RouterLink><RouterLink to="/">专题</RouterLink></div></div></div>
</template><style scoped lang='scss'>
.app-header-sticky {width: 100%;height: 80px;position: fixed;left: 0;top: 0;z-index: 999;background-color: #fff;border-bottom: 1px solid #e4e4e4;// 此处为关键样式!!!// 状态一：往上平移自身高度 + 完全透明transform: translateY(-100%);opacity: 0;// 状态二：移除平移 + 完全不透明&.show {transition: all 0.3s linear;transform: none;opacity: 1;}.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;}}}
}.app-header-nav {width: 820px;display: flex;padding-left: 40px;position: relative;z-index: 998;li {margin-right: 40px;width: 38px;text-align: center;a {font-size: 16px;line-height: 32px;height: 32px;display: inline-block;&:hover {color: $xtxColor;border-bottom: 1px solid $xtxColor;}}.active {color: $xtxColor;border-bottom: 1px solid $xtxColor;}}
}
</style>

import { ref } from 'vue'
import { defineStore } from 'pinia'
import { getCategoryAPI } from '@/apis/layout'
export const useCategoryStore = defineStore('category', () => {// 导航列表的数据管理// state 导航列表数据const categoryList = ref([])// action 获取导航数据的方法const getCategory = async () => {const res = await getCategoryAPI()categoryList.value = res.result}return {categoryList,getCategory}
})

然后这些东西都可以不要了

再重新优化

<script setup>
import {useScroll} from '@vueuse/core'
import{useCategoryStore} from '@/stores/category'
const {y} = useScroll(window)// 使用pinia中的数据
const categoryStore = useCategoryStore()
</script><template><div class="app-header-sticky"><div class="container"><RouterLink class="logo" to="/" /><!-- 导航区域 --><ul class="app-header-nav "><li class="home"><RouterLink to="/">首页</RouterLink></li><li><li class="home" v-for="item in categoryStore.categoryList><RouterLink to ="/">{{item.name}}</RouterLink></li></ul><div class="right"><RouterLink to="/">品牌</RouterLink><RouterLink to="/">专题</RouterLink></div></div></div>
</template><style scoped lang='scss'>
.app-header-sticky {width: 100%;height: 80px;position: fixed;left: 0;top: 0;z-index: 999;background-color: #fff;border-bottom: 1px solid #e4e4e4;// 此处为关键样式!!!// 状态一：往上平移自身高度 + 完全透明transform: translateY(-100%);opacity: 0;// 状态二：移除平移 + 完全不透明&.show {transition: all 0.3s linear;transform: none;opacity: 1;}.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;}}}
}.app-header-nav {width: 820px;display: flex;padding-left: 40px;position: relative;z-index: 998;li {margin-right: 40px;width: 38px;text-align: center;a {font-size: 16px;line-height: 32px;height: 32px;display: inline-block;&:hover {color: $xtxColor;border-bottom: 1px solid $xtxColor;}}.active {color: $xtxColor;border-bottom: 1px solid $xtxColor;}}
}
</style>

同理LayoutHeader.vue也一样，把共同的部分封装在stores里面，所以可以删除掉那些东西

<script setup>
import{useCategoryStore} from '@/stores/category'
const categoryStore = useCategoryStore()
</script>// 3。v-for渲染数据
<template><header class='app-header'><div class="container"><h1 class="logo"><RouterLink to="/">小兔鲜</RouterLink></h1><ul class="app-header-nav"><li class="home"><RouterLink to="/">首页</RouterLink></li><li class="home" v-for="item in categoryStore.categoryList" :key="item.id"><RouterLink to ="/">{{item.name}}</RouterLink></li></ul><div class="search"><i class="iconfont icon-search"></i><input type="text" placeholder="搜一搜"></div><!-- 头部购物车 --></div></header>
</template><style scoped lang='scss'>
.app-header {background: #fff;.container {display: flex;align-items: center;}.logo {width: 200px;a {display: block;height: 132px;width: 100%;text-indent: -9999px;background: url('@/assets/images/logo.png') no-repeat center 18px / contain;}}.app-header-nav {width: 820px;display: flex;padding-left: 40px;position: relative;z-index: 998;li {margin-right: 40px;width: 38px;text-align: center;a {font-size: 16px;line-height: 32px;height: 32px;display: inline-block;&:hover {color: $xtxColor;border-bottom: 1px solid $xtxColor;}}.active {color: $xtxColor;border-bottom: 1px solid $xtxColor;}}}.search {width: 170px;height: 32px;position: relative;border-bottom: 1px solid #e7e7e7;line-height: 32px;.icon-search {font-size: 18px;margin-left: 5px;}input {width: 140px;padding-left: 5px;color: #666;}}.cart {width: 50px;.curr {height: 32px;line-height: 32px;text-align: center;position: relative;display: block;.icon-cart {font-size: 22px;}em {font-style: normal;position: absolute;right: 0;top: 0;padding: 1px 6px;line-height: 1;background: $helpColor;color: #fff;font-size: 12px;border-radius: 10px;font-family: Arial;}}}
}
</style>