1.基本购物车
<body>
<div id="app">
<div class="container-fluid">
<div class="row">
<div class="col-md-6 col-md-offset-3">
<h1 class="text-center">购物车</h1>
<table class="table table-bordered">
<thead>
<tr>
<th>商品id</th>
<th>商品名</th>
<th>商品价格</th>
<th>商品数量</th>
<th>操作</th>
</tr>
</thead>
<tbody>
<tr v-for="good in good_list">
<th>{{good.id}}</th>
<td>{{good.name}}</td>
<td>{{good.price}}</td>
<td>{{good.number}}</td>
<td><input type="checkbox" :value="good" v-model="checkGroup"></td>
</tr>
</tbody>
</table>
<hr>
选中了：{{checkGroup}}
<h3>总价格：{{getPrice()}}</h3>
<h3>选中了checkbox，checkGroup会发生变化，页面也在变，都会重新刷新页面。函数就会重新执行</h3>
</div>
</div>
</div>
</div>
</body>
<script>
let vm = new Vue({
el:'#app',
data:{
good_list: [
{id: 1, name: '钢笔', price: 12, number: 2},
{id: 2, name: '脸盆', price: 20, number: 20},
{id: 3, name: '毛笔', price: 6, number: 9},
{id: 4, name: '圆珠笔', price: 8, number: 5},
{id: 5, name: '铅笔', price: 1, number: 3},
],
checkGroup: [],
},
methods:{
// 1 根据checkGroup选中的计算
// 循环checkGroup 拿出价格*数量 累加 最后返回
getPrice(){
var total = 0
for (item of this.checkGroup){
total += item.price * item.number
}
return total
}
}
})
</script>
2.带全选 / 全不选功能购物车
<body>
<div id="app">
<div class="container-fluid">
<div class="row">
<div class="col-md-6 col-md-offset-3">
<h1 class="text-center">购物车</h1>
<table class="table table-bordered">
<thead>
<tr>
<th>商品ID</th>
<th>商品名</th>
<th>商品价格</th>
<th>商品数量</th>
<th>全选/全不选 <input type="checkbox" v-model="checkAll" @change="handleCheckAll"></th>
</tr>
</thead>
<tbody>
<tr v-for="good in good_list">
<th scope="row">{{good.id}}</th>
<td>{{good.name}}</td>
<td>{{good.price}}</td>
<td>{{good.number}}</td>
<td><input type="checkbox" :value="good" v-model="checkGroup" @change="handlecCheckOne"></td>
</tr>
</tbody>
</table>
<hr>
选中了：{{checkGroup}}
<h3>总价格：{{getPrice()}}</h3>
<h3>选中了checkbox，checkGroup会发生变化，页面也在变，都会重新刷新页面，函数就会重新执行</h3>
</div>
</div>
</div>
</div>
</body>
<script>
var vm = new Vue({
el: '#app',
data: {
good_list: [
{id: 1, name: '钢笔', price: 12, number: 2},
{id: 2, name: '脸盆', price: 20, number: 20},
{id: 3, name: '毛笔', price: 6, number: 9},
{id: 4, name: '圆珠笔', price: 8, number: 5},
{id: 5, name: '铅笔', price: 1, number: 3},
],
checkGroup: [],
checkAll:false,
},
methods: {
getPrice() {
// 1 根据checkGroup选中的，计算
// 循环checkGroup，拿出价格*数量，累加，最后返回
var total = 0
for (item of this.checkGroup) {
total += item.number * item.price
}
return total
},
handleCheckAll(){
if (this.checkAll){
this.checkGroup = this.good_list
}else {
this.checkGroup = []
}
},
handlecCheckOne(){
if (this.checkGroup.length===this.good_list.length){
this.checkAll = true
}else {
this.checkAll = false
}
},
}
})
</script>
3.购物车带加减商品功能
<body>
<div id="app">
<div class="container-fluid">
<div class="row">
<div class="col-md-6 col-md-offset-3">
<h1 class="text-center">购物车</h1>
<table class="table table-bordered">
<thead>
<tr>
<th>商品ID</th>
<th>商品名</th>
<th>商品价格</th>
<th>商品数量</th>
<th>全选/全不选 <input type="checkbox" v-model="checkAll" @change="handleCheckAll"></th>
</tr>
</thead>
<tbody>
<tr v-for="good in good_list">
<th scope="row">{{good.id}}</th>
<td>{{good.name}}</td>
<td>{{good.price}}</td>
<td>
<button class="btn" @click="handleJian(good)">-</button>
{{good.number}}
<button class="btn" @click="handleJia(good)">+</button>
</td>
<td><input type="checkbox" :value="good" v-model="checkGroup" @change="handlecCheckOne"></td>
</tr>
</tbody>
</table>
<hr>
选中了：{{checkGroup}}
<h3>总价格：{{getPrice()}}</h3>
<h3>选中了checkbox，checkGroup会发生变化，页面也在变，都会重新刷新页面，函数就会重新执行</h3>
</div>
</div>
</div>
</div>
</body>
<script>
var vm = new Vue({
el: '#app',
data: {
good_list: [
{id: 1, name: '钢笔', price: 12, number: 1},
{id: 2, name: '脸盆', price: 20, number: 1},
{id: 3, name: '毛笔', price: 6, number: 1},
{id: 4, name: '圆珠笔', price: 8, number: 1},
{id: 5, name: '铅笔', price: 1, number: 1},
],
checkGroup: [],
checkAll: false,
},
methods: {
getPrice() {
// 1 根据checkGroup选中的，计算
// 循环checkGroup，拿出价格*数量，累加，最后返回
var total = 0
for (item of this.checkGroup) {
total += item.number * item.price
}
return total
},
handleCheckAll() {
if (this.checkAll) {
this.checkGroup = this.good_list
} else {
this.checkGroup = []
}
},
handlecCheckOne() {
if (this.checkGroup.length === this.good_list.length) {
this.checkAll = true
} else {
this.checkAll = false
}
},
handleJian(good) {
if (good.number > 1) {
good.number--
} else {
alert('不能再删了')
}
},
handleJia(good) {
good.number++
},
}
})
</script>
