利用Vue写一个购物车项目
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<script src="js/vue.js" type="text/javascript"></script>
<script src="js/jquery-3.6.0.js" type="text/javascript"></script>
<div id="app" >
<div it="container">
<my-cart></my-cart>
</div>
</div>
<style>
* {
padding: 0;
margin: 0
}
a {
text-decoration: none;
}
.container {
width: 500px;
margin: 10px auto;
}
.title {
width: 500px;
height: 50px;
text-align: center;
line-height: 50px;
font-size: 20px;
background-color: paleturquoise;
}
.item {
width: 500px;
position: relative;
height: 50px;
border-bottom: 1px solid rgb(0, 0, 0);
}
.item img {
float: left;
width: 100px;
height: 50px;
}
/* .item name {
position: absolute;
float: left;
width: 120px;
margin-left: 10px;
top: 15px;
left: 100px;
} */
/* .item .price {
position: absolute;
float: left;
width: 120px;
margin-left: 10px;
top: 15px;
left: 100px;
} */
.item .change {
position: absolute;
left: 220px;
top: 15px;
float: left;
width: 200px;
}
.change a {
float: left;
display: block;
width: 20px;
height: 20px;
font-size: 18px;
text-align: center;
line-height: 20px;
background-color: #ccc;
}
.change input {
float: left;
width: 50px;
margin: 0 5px;
}
.item .del {
position: absolute;
top: 8px;
left: 420px;
color: red;
font-size: 24px;
}
.item .del:hover {
top: 0;
height: 50px;
background-color: rgb(247, 247, 247);
}
.total {
position: relative;
width: 500px;
height: 50px;
background-color: sandybrown;
}
.total span {
position: absolute;
top: 14px;
left: 250px;
}
.total span em {
color: red;
font-style: normal;
font-size: 20px;
}
.total button {
position: absolute;
top: 8px;
left: 400px;
width: 50px;
height: 35px;
border-radius: 25%;
border: none;
outline: none;
background-color: tomato;
}
</style>
<script src="js/vue.js"></script>
<script>
// 三个子组件
var CartTitle = {
template: `<div class="title">我的商品</div>`
}
var CartList = {
props: ['list'],
template: ` <div class="list">
<div class="item" :key="item.id" v-for="item in list">
<img :src="item.img" alt="">
<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="changenum(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("del-cart", id);
},
changenum: function(id, event) {
this.$emit('change-num', {
id: id,
num: event.target.value
})
},
sub: function(id) {
this.$emit('sub-num', id);
},
add: function(id) {
this.$emit('add-num', id);
}
}
}
var CartTotal = {
props: ['list'],
template: `<div class="total">
<span>总价：<em>{{total}}</em>￥</span>
<button>结算</button>
</div>`,
computed: {
total: function() {
var sum = 0;
this.list.forEach(item => {
sum += item.price * item.num;
});
return sum;
}
}
}
//父组件
Vue.component('my-cart', {
data: function() {
return {
list: [{
id: 1,
name: 'TCL彩电',
price: 460,
num: 1,
img: 'images/猫一.jpg'
}, {
id: 2,
name: '机顶盒',
price: 3000,
num: 1,
img: 'images/猫二.jpg'
}, {
id: 3,
name: '海尔冰箱',
price: 6799,
num: 1,
img: 'images/猫三.jpg'
}, {
id: 4,
name: '小米手机',
price: 2000,
num: 1,
img: 'images/猫二.jpg'
},
{
id: 5,
name: 'PPTV电视',
price: 1000,
num: 1,
img: 'images/猫二.jpg'
}
]
}
},
template: `<div class="mycart">
<cart-title></cart-title>
<cart-list :list="list" @del-cart="delcart($event)" @change-num="changeNum($event)" @sub-num="subnum($event)" @add-num="addnum($event)"></cart-list>
<cart-total :list="list"></cart-total>
</div>`,
components: {
'cart-title': CartTitle,
'cart-list': CartList,
'cart-total': CartTotal,
},
methods: {
delcart: function(id) {
// 根据id删除list中对应的数据
// 1.找到id对应数据的索引
var index = this.list.findIndex(item => {
return item.id == id;
});
// 2.根据索引删除对应的数据
this.list.splice(index, 1);
},
// 根据id修改list中的数量num
changeNum: function(val) {
//console.log(val);
this.list.some(item => {
if (item.id == val.id) {
item.num = val.num;
}
})
},
subnum: function(event) {
// console.log(event); event是点击的id号
this.list.some(item => {
if (item.id == event && item.num > 0) {
item.num--;
}
})
},
addnum: function(event) {
this.list.some(item => {
if (item.id == event) {
item.num++;
}
})
}
}
});
var vm = new Vue({
el: "#app",
data: {
}
});
</script>
</body>
</html>
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