Vue实现电梯样式锚点导航效果流程详解（vue单向数据流）学到了吗

<template>
<div class=”classify”>
<div class=”left”>
<div class=”item” :class=”{ active: currentIndex==index }” v-for=”(item, index) in types”
@click=”changeType(index)”>{{ item }}
</div>
</div>
<div class=”right” @scroll=”handleScroll”>
<div v-for=”(item, index) in shops” :key=”index” ref=”shop”>
<div class=”title”>{{ item.category }}</div>
<div class=”item” v-for=”(i, j) in item.data” :key=”j”>
<div class=”photo”>
<img src=”https://www.jb51.net/vite.svg” class=”logo” alt=”Vite logo” />
</div>
<div class=”info”>
<div class=”name”>{{ i.name }}</div>
<div class=”type”>{{ i.type }}</div>
<div class=”desc”>{{ i.desc }}</div>
<div class=”buy”>购买</div>
</div>
</div>
</div>
</div>
</div>
</template>
<script setup>
import { ref, onMounted, onBeforeUnmount, nextTick } from ‘vue’
let isLock=ref(false)
// 分类
let types=ref([
‘人气Top’,
‘爆款套餐’,
‘大师咖啡’,
‘小黑杯’,
‘中国茶咖’,
‘生椰家族’,
‘厚乳拿铁’,
‘丝绒拿铁’,
‘生酪拿铁’,
‘经典拿铁’,
])
// 商品
let shops=ref([
{
category: ‘人气Top’,
data: [
{
name: ‘冰吸生椰拿铁’,
type: ‘咖啡’,
desc: ‘咖啡’
}, {
name: ‘生椰拿铁’,
type: ‘咖啡’,
desc: ‘咖啡’
}, {
name: ‘摸鱼生椰拿铁’,
type: ‘咖啡’,
desc: ‘咖啡’
}, {
name: ‘茉莉花香拿铁’,
type: ‘咖啡’,
desc: ‘咖啡’
}, {
name: ‘丝绒拿铁’,
type: ‘咖啡’,
desc: ‘咖啡’
},
{
name: ‘小甘橘美式’,
type: ‘咖啡’,
desc: ‘咖啡’
},
]
},
{
category: ‘爆款套餐’,
data: [
{
name: ‘2杯套餐’,
type: ‘咖啡’,
desc: ‘咖啡’
}, {
name: ‘3杯套餐’,
type: ‘咖啡’,
desc: ‘咖啡’
}, {
name: ‘4杯套餐’,
type: ‘咖啡’,
desc: ‘咖啡’
}, {
name: ‘5杯套餐’,
type: ‘咖啡’,
desc: ‘咖啡’
}, {
name: ‘不喝咖啡套餐’,
type: ‘咖啡’,
desc: ‘咖啡’
},
{
name: ‘必喝套餐’,
type: ‘咖啡’,
desc: ‘咖啡’
},
]
},
{
category: ‘大师咖啡’,
data: [
{
name: ‘美式’,
type: ‘咖啡’,
desc: ‘咖啡’
}, {
name: ‘加浓美式’,
type: ‘咖啡’,
desc: ‘咖啡’
}, {
name: ‘橙C美式’,
type: ‘咖啡’,
desc: ‘咖啡’
}, {
name: ‘澳瑞白’,
type: ‘咖啡’,
desc: ‘咖啡’
}, {
name: ‘卡布奇诺’,
type: ‘咖啡’,
desc: ‘咖啡’
},
{
name: ‘玛奇朵’,
type: ‘咖啡’,
desc: ‘咖啡’
},
]
},
{
category: ‘小黑杯’,
data: [
{
name: ‘云南小柑橘’,
type: ‘咖啡’,
desc: ‘咖啡’
}, {
name: ‘广东小柑橘’,
type: ‘咖啡’,
desc: ‘咖啡’
}, {
name: ‘广西小柑橘’,
type: ‘咖啡’,
desc: ‘咖啡’
}, {
name: ‘福建小柑橘’,
type: ‘咖啡’,
desc: ‘咖啡’
}, {
name: ‘湖南小柑橘’,
type: ‘咖啡’,
desc: ‘咖啡’
},
{
name: ‘江西小柑橘’,
type: ‘咖啡’,
desc: ‘咖啡’
},
]
},
{
category: ‘中国茶咖’,
data: [
{
name: ‘碧螺知春拿铁’,
type: ‘咖啡’,
desc: ‘咖啡’
}, {
name: ‘茉莉花香拿铁’,
type: ‘咖啡’,
desc: ‘咖啡’
}, {
name: ‘菊花香拿铁’,
type: ‘咖啡’,
desc: ‘咖啡’
}, {
name: ‘梅花香拿铁’,
type: ‘咖啡’,
desc: ‘咖啡’
}, {
name: ‘兰花香拿铁’,
type: ‘咖啡’,
desc: ‘咖啡’
},
{
name: ‘玫瑰花香拿铁’,
type: ‘咖啡’,
desc: ‘咖啡’
},
]
},
{
category: ‘生椰家族’,
data: [
{
name: ‘冰吸生椰拿铁’,
type: ‘咖啡’,
desc: ‘咖啡’
}, {
name: ‘生椰拿铁’,
type: ‘咖啡’,
desc: ‘咖啡’
}, {
name: ‘摸鱼生椰拿铁’,
type: ‘咖啡’,
desc: ‘咖啡’
}, {
name: ‘椰云拿铁’,
type: ‘咖啡’,
desc: ‘咖啡’
}, {
name: ‘丝绒拿铁’,
type: ‘咖啡’,
desc: ‘咖啡’
},
{
name: ‘陨石拿铁’,
type: ‘咖啡’,
desc: ‘咖啡’
},
]
},
{
category: ‘厚乳拿铁’,
data: [
{
name: ‘厚乳拿铁’,
type: ‘咖啡’,
desc: ‘咖啡’
}, {
name: ‘生椰拿铁’,
type: ‘咖啡’,
desc: ‘咖啡’
}, {
name: ‘茉莉花香拿铁’,
type: ‘咖啡’,
desc: ‘咖啡’
}, {
name: ‘椰云拿铁’,
type: ‘咖啡’,
desc: ‘咖啡’
}, {
name: ‘丝绒拿铁’,
type: ‘咖啡’,
desc: ‘咖啡’
},
{
name: ‘海盐拿铁’,
type: ‘咖啡’,
desc: ‘咖啡’
},
]
},
{
category: ‘丝绒拿铁’,
data: [
{
name: ‘丝绒拿铁’,
type: ‘咖啡’,
desc: ‘咖啡’
}, {
name: ‘生椰丝绒拿铁’,
type: ‘咖啡’,
desc: ‘咖啡’
}, {
name: ‘黑糖丝绒拿铁’,
type: ‘咖啡’,
desc: ‘咖啡’
}, {
name: ‘椰云丝绒拿铁’,
type: ‘咖啡’,
desc: ‘咖啡’
}, {
name: ‘香草丝绒拿铁’,
type: ‘咖啡’,
desc: ‘咖啡’
}
]
},
{
category: ‘生酪拿铁’,
data: [
{
name: ‘生酪拿铁’,
type: ‘咖啡’,
desc: ‘咖啡’
}, {
name: ‘绿豆拿铁’,
type: ‘咖啡’,
desc: ‘咖啡’
}, {
name: ‘红豆拿铁’,
type: ‘咖啡’,
desc: ‘咖啡’
}, {
name: ‘黑豆拿铁’,
type: ‘咖啡’,
desc: ‘咖啡’
}, {
name: ‘黄豆拿铁’,
type: ‘咖啡’,
desc: ‘咖啡’
}
]
},
{
category: ‘经典拿铁’,
data: [
{
name: ‘拿铁’,
type: ‘咖啡’,
desc: ‘咖啡’
}, {
name: ‘陨石拿铁’,
type: ‘咖啡’,
desc: ‘咖啡’
}, {
name: ‘焦糖拿铁’,
type: ‘咖啡’,
desc: ‘咖啡’
}, {
name: ‘生椰拿铁’,
type: ‘咖啡’,
desc: ‘咖啡’
}, {
name: ‘美式’,
type: ‘咖啡’,
desc: ‘咖啡’
}
]
},
])
// 获取右侧商品的ref实例
let shop=ref(null)
// 用来表示当前选中处于激活状态的分类的索引
let currentIndex=ref(0)
// 切换类型
const changeType=val=> {
currentIndex.value=val
// 获取选中的dom元素
const typeItemDom=shop.value[val]
// 开锁
isLock.value=true
// 第一个参数为水平方向，第二个参数为纵轴方向
window.scrollTo(0, typeItemDom.offsetTop)
setTimeout(()=> {
//关锁
isLock.value=false
}, 0)
}
// 监听页面滚动
const handleScroll=()=> {
// 锁关了滚动事件才有效
if (!isLock.value) {
types.value.forEach((item, index)=> {
// console.dir(shop.value[index]);
const shopItemDom=shop.value[index]
// 每个模块距离顶部的距离
const offsetTop=shopItemDom.offsetTop
// 页面滚动的距离
const scrollTop=document.documentElement.scrollTop
if (scrollTop >=offsetTop) {
// 给左边分类设置激活的效果
currentIndex.value=index
}
})
}
}
onMounted(()=> {
window.addEventListener(‘scroll’, handleScroll);
})
onBeforeUnmount(()=> {
window.removeEventListener(‘scroll’, handleScroll);
})
</script>
<style scoped lang=”less”>
.classify {
display: flex;
position: relative;
.left {
display: flex;
flex-direction: column;
align-items: center;
position: fixed;
left: 0;
top: 0;
bottom: 0;
width: 92px;
overflow-y: scroll;
border-right: 1px solid #C1C2C4;
.item {
display: flex;
justify-content: center;
align-items: center;
width: 67px;
height: 29px;
font-size: 15px;
font-family: PingFang SC-Semibold, PingFang SC;
font-weight: 600;
color: #333333;
}
.active {
color: #00B1FF;
}
.item:not(:last-child) {
margin-bottom: 25px;
}
}
.right {
flex: 1;
position: absolute;
top: 0;
right: 17px;
overflow-y: scroll;
.title {
font-size: 18px;
margin-bottom: 5px;
}
.item {
display: flex;
justify-content: space-between;
margin-bottom: 17px;
width: 246px;
height: 73px;
.photo {
width: 58px;
height: 58px;
img {
width: 100%;
height: 100%;
border-radius: 12px;
border: 1px solid gray;
}
}
.info {
display: flex;
flex-direction: column;
position: relative;
width: 171px;
height: 73px;
box-shadow: 0px 1px 0px 0px rgba(221, 221, 221, 1);
.name {
padding-left: 0;
font-size: 17px;
font-weight: 600;
color: #333333;
}
.type,
.desc {
font-size: 14px;
font-weight: 400;
color: #999999;
}
.buy {
display: flex;
align-items: center;
justify-content: center;
position: absolute;
right: 0;
top: 17px;
width: 67px;
height: 29px;
background: #E7E8EA;
border-radius: 21px;
font-size: 15px;
font-family: PingFang SC-Semibold, PingFang SC;
font-weight: 600;
color: #05AFFA;
}
}
}
}
}
</style>