功能分析 : v-for显示商品名字,价格,数量和对商品进行操作,全选的功能
结构仍然分成 : index.html , index.js , style.css
index.html
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>购物车实例</title> <link href="https://www.jb51.net/style.css" > </head> <body> <div v-cloak> <template v-if="list.length"> <table> <thead> <tr> <th><input type="checkbox" @click='checkAll' :checked='allCheck'></th> <th>序号</th> <th>商品名称</th> <th>商品单价</th> <th>购买数量</th> <th>操作</th> </tr> </thead> <tbody> <tr v-for="(item,index) in list"> <td><input type="checkbox" :checked='item.isChecked' @click="singleCheck(index)"></td> <td>{{index + 1}}</td> <td>{{item.name}}</td> <td>{{item.price}}</td> <td> <button @click="handleReduce(index)" :disable="item.count === 1 ">-</button> {{item.count}} <button @click="handleAdd(index)">+</button> </td> <td> <button @click="handleRemove">移除</button> </td> </tr> </tbody> </table> <div>总价 : ¥{{totalPrice}}</div> </template> <div v-else>购物车为空</div> </div> </body> <!-- 通过cdn引入--> <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script> <script src="https://www.jb51.net/index.js"></script> </html>
index.js
const app = new Vue({ el : '#app', data : { allCheck:false, list : [ { id: 1 , name :'iPhone 8 ', price: 6188 , count: 1 , isChecked : false }, { id: 2 , name :'小米 8 ', price: 5888 , count: 1 , isChecked : false }, { id: 3 , name :'iPad Pro ', price: 11000 , count: 1 , isChecked : false }, { id: 4 , name :'雷神SE9', price: 6188 , count: 10 , isChecked : false }, ] }, computed : { //通过计算属性获取总价格 totalPrice:function() { let total = 0; const newArr = this.list.filter(value => { return value.isChecked == true }) for(var i = 0 ;i<newArr.length;i++) { total += this.list[i].price * this.list[i].count } //返回一个符合千分位格式的金额数 //return total.toString().replace(/\B(?=(\d{3})+$)/g,',') return total } }, methods : { //减法 handleReduce:function(index) { if(this.list[index].count === 1) return ; this.list[index].count--; }, //加法 handleAdd:function(index) { this.list[index].count++ }, //移除 handleRemove:function(index) { this.list.splice(index,1) }, //全选 checkAll() { this.allCheck = !this.allCheck this.list.forEach(value => { value.isChecked = this.allCheck }) }, //单选,当全部选中时,改变全选按钮的状态 singleCheck(index) { this.list[index].isChecked = !this.list[index].isChecked const selectData = this.list.filter(value => { return value.isChecked == true }) this.allCheck = selectData.length === this.list.length ? true : false } } })
style.css
[v-cloak] { display: none; } table { border: 1px solid #e9e9e9; border-collapse: collapse; border-spacing: 0; empty-cells: show; } th,td { padding: 8px 16px; border: 1px solid #e9e9e9; text-align: left; } th { background: yellowgreen; color: #5c6b77; font-weight: 600; white-space: nowrap; }
效果图如下
