演示地址：https://jinxiaoliang.cn/Personal/Car/Car.html
实现步骤
1.按照组件化方式实现业务需求
根据业务功能进行组件化划分
- 标题组件（展示文本）
- 列表组件（列表展示、商品数量变更、商品删除）
- 结算组件（计算商品总额）
2.功能实现步骤
- 实现整体布局和样式效果
- 划分独立的功能组件
- 组合所有的子组件形成整体结构
逐个实现各个功能组件
- 标题组件
- 列表组件
- 结算组件
3.代码
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<style type="text/css">
.container {
}
.container .cart {
width: 300px;
/*background-color: lightgreen;*/
margin: auto;
}
.container .title {
background-color: lightblue;
height: 40px;
line-height: 40px;
text-align: center;
/*color: #fff;*/
}
.container .total {
background-color: #FFCE46;
height: 50px;
line-height: 50px;
text-align: right;
}
.container .total button {
margin: 0 10px;
background-color: #DC4C40;
height: 35px;
width: 80px;
border: 0;
}
.container .total span {
color: red;
font-weight: bold;
}
.container .item {
height: 55px;
line-height: 55px;
position: relative;
border-top: 1px solid #ADD8E6;
}
.container .item img {
width: 45px;
height: 45px;
margin: 5px;
}
.container .item .name {
position: absolute;
width: 90px;
top: 0;left: 55px;
font-size: 16px;
}
.container .item .change {
width: 100px;
position: absolute;
top: 0;
right: 50px;
}
.container .item .change a {
font-size: 20px;
width: 30px;
text-decoration:none;
background-color: lightgray;
vertical-align: middle;
}
.container .item .change .num {
width: 40px;
height: 25px;
}
.container .item .del {
position: absolute;
top: 0;
right: 0px;
width: 40px;
text-align: center;
font-size: 40px;
cursor: pointer;
color: red;
}
.container .item .del:hover {
background-color: orange;
}
</style>
</head>
<body>
<div id="app">
<div class="container">
<my-cart></my-cart>
</div>
</div>
<script type="text/javascript" src="js/vue.js"></script>
<script type="text/javascript">
var CarTitle = {
props:['uname'],
template:`
<div class="title">{{uname}}的商品</div>
`
};
var CarList = {
props: ['list'],
template: `
<div>
<div class="item" :key='item.id' v-for='item in list'>
<img :src="item.img"/>
<div class="name">{{item.name}}</div>
<div class="change">
<a href="" @click.prevent='sub(item.id)'>－</a>
<input type="text" class="num" :value='item.num' @blur='changNum(item.id,$event)'/>
<a href="" @click.prevent='add(item.id)'>＋</a>
</div>
<div class="del" @click='del(item.id)'>×</div>
</div>
</div>
`,
methods: {
del: function(id) {
this.$emit('cart-del',id)
},
changNum: function(id,event) {
this.$emit('change-num',{
id: id,
type: 'change',
num:event.target.value
});
},
sub: function(id) {
this.$emit('change-num',{
id: id,
type: 'sub'
})
},
add: function(id) {
this.$emit('change-num',{
id: id,
type: 'add'
})
}
}
};
var CarTotal = {
props: ['list'],
template: `
<div class="total">
<span>总价：{{total}}</span>
<button>结算</button>
</div>
`,
computed: {
total: function() {
//计算商品的总价
var t = 0;
this.list.forEach(item => {
t += item.price*item.num;
});
return t;
}
}
};
Vue.component('my-cart', {
data: function() {
return {
uname:'张三',
list: [{
id: 1,
name: 'TCL彩电',
price: 1000,
num: 1,
img: 'img/a.jpg'
},{
id: 2,
name: '机顶盒',
price: 1000,
num: 1,
img: 'img/b.jpg'
},{
id: 3,
name: '海尔冰箱',
price: 1000,
num: 1,
img: 'img/c.jpg'
},{
id: 4,
name: '小米手机',
price: 1000,
num: 1,
img: 'img/d.jpg'
},{
id: 5,
name: 'PPTV电视',
price: 1000,
num: 2,
img: 'img/e.jpg'
}]
}
},
template: `
<div class="cart">
<cart-title :uname='uname'></cart-title>
<cart-list :list='list' @cart-del='delCart($event)' @change-num='changeNum($event)'></cart-list>
<cart-total :list='list'></cart-total>
</div>
`,
components: {
'cart-title':CarTitle,
'cart-list':CarList,
'cart-total':CarTotal
},
methods: {
delCart: function(id) {
//1.找到id对应数据的索引
var index = this.list.findIndex(item => {
return item.id == id
});
//2.根据索引删除相应的数据
this.list.splice(index,1)
},
changeNum: function(val) {
//分为三种情况：输入域变更、加号变更、减号变更
if(val.type == 'change') {
this.list.some(item => {
if(item.id == val.id) {
item.num = val.num;
return true;
}
})
} else if(val.type == 'sub') {
this.list.some(item => {
if(item.id == val.id && item.num >= 1) {
item.num -= 1;
//终止遍历
return true;
}
})
} else if(val.type == 'add') {
this.list.some(item => {
if(item.id == val.id && item.num >= 1) {
item.num += 1;
//终止遍历
return true
}
})
}
}
}
});
var vm = new Vue({
el: '#app',
data: {
}
});
</script>
</body>
</html>