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<!DOCTYPE html><html> <head> <meta charset="utf-8"> <title></title> <link rel="stylesheet" href="style.css"> </head> <body> <div id="app"> <div v-if="books.length"> <table border="" cellspacing="" cellpadding=""> <thead> <tr> <th></th> <th>书籍名称</th> <th>出版日期</th> <th>价格</th> <th>购买数量</th> <th>操作</th> </tr> </thead> <tbody> <tr v-for="(item,index) in books"> <td>{{item.id}}</td> <td>{{item.name}}</td> <td>{{item.data}}</td> <td>{{item.price | showPrice}}</td> <!--过滤器 --> <td> <button @click="decrement(index)" v-bind:disabled="item.count <= 1">-</button> {{item.count}} <button @click="increment(index)">+</button> </td> <td> <button @click="remove(index)">删除</button> </td> </tr> </tbody> </table> <h2> 总价格:{{totolPrice | showPrice}} </h2> </div> <h2 v-else>购物车为空</h2> </div> </body> <script type="text/javascript" src="../vue.js"></script> <script src="index.js"></script></html> |
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table{ border: 1px solid #ccc; border-collapse: collapse; border-spacing: 0;}th,td{ padding: 8px 16px; border: 1px solid #ccc; text-align: left;}th{ background-color: #e7e7e7; color: darkgray; font-weight: 600;} |
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const app = new Vue({ el:'#app', data:{ books:[ {id:100,name:'计算机组成原理',data:2002,price:100,count:1}, {id:101,name:'现代操作系统',data:2002,price:100,count:1}, {id:102,name:'Unix编程艺术',data:2002,price:100,count:1}, {id:103,name:'代码大全',data:2002,price:100,count:1}, ], }, methods:{ increment(index){ this.books[index].count++; }, decrement(index){ this.books[index].count--; }, remove(index){ this.books.splice(index,1) } }, //计算属性 computed:{ totolPrice(){ //第一种写法 let totolPrice = 0; for(let i=0;i<this.books.length;i++){ totolPrice += this.books[i].count * this.books[i].price; } return totolPrice; //第二种写法 // let totolPrice = 0; // for(let i in this.books){ // totolPrice += this.books[i].count * this.books[i].price; // } // return totolPrice; //第三种写法 // let totolPrice = 0; // for(item of this.books){ // totolPrice += item.count * item.price; // } // return totolPrice; } }, //过滤器 filters:{ showPrice(price){ return '￥' + price.toFixed(2); } }}) |