vue购物车案例 vue实现简单购物车案例
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代码:
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title>Document</title> </head> <body> <div id="app"> <table> <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' ::key="item"> <td>{{item.id}}</td> <td>{{item.name}}</td> <td>{{item.date}}</td> <td>{{item.price*item.count | getFinalPrice}}</td> <td> <button @click='reduce(index)' :disabled='item.count <= 1'>-</button> {{item.count}} <button @click='add(index)'>+</button> </td> <td> <button @click='removeBtn(index)'>移除</button> </td> </tr> </tbody> </table> <h2 v-if='books!=""'>总价格:{{theSumOf | getFinalPrice}}</h2> <h2 v-else>购物车为空</h2> </div> </body> <script src="../js/vue.min.js"></script> <script> var app = new Vue({ el: '#app', data: { books: [ { id: 1, name: '计算机应用', date: '2006-9', price: 85.00, count: 1 }, { id: 2, name: 'java应用', date: '2006-9', price: 10.00, count: 1 }, { id: 3, name: '大数据', date: '2006-9', price: 85.00, count: 1 }, { id: 4, name: 'ui设计师', date: '2006-9', price: 85.00, count: 1 }, ], addAnd:0 }, methods: { add(index) { this.books[index].count++ }, reduce(index) { this.books[index].count-- }, removeBtn(index) { this.books.splice(index, 1) } }, components: { }, computed: { theSumOf: function () { //累加计算的第一种方法 //let sum = 0 //this.books.forEach(item => { // sum += parseInt(item.price)*parseInt(item.count) }); //return sum //累加计算的第二种方式 //let sum = 0 //for(let i in this.books){ //sum += this.books[i].price*this.books[i]*count } //return sum //累加计算的第三种方式 //let sum = 0 //for(let item of this.books){ //sum += item.price*item.count //} //return sum //累加计算的第四种方法 return this.books.reduce(function(preValue,book){ return preValue + book.price*book.count },0) } }, filters: { getFinalPrice(price) { return '¥' + price.toFixed(2) }, } }); </script> <html>
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