这篇“如何用vue实现可改变购物数量的购物车”文章的知识点大部分人都不太理解，所以小编给大家总结了以下内容，内容详细，步骤清晰，具有一定的借鉴价值，希望大家阅读完这篇文章能有所收获，下面我们一起来看看这篇“如何用vue实现可改变购物数量的购物车”文章吧。
1.computed 计算属性
2.filters 过滤器
<!DOCTYPE html> <html> <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> <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script> <style> table { border-collapse: collapse; border-spacing: 0; border: 1px solid #ccc; } td, th { padding: 8px 16px; border: 1px solid #ccc; text-align: left; } th { background-color: #f7f7f7; color: #5c6b77; } </style> <body> <div id="box"> <div v-if="books.length"> <table> <thead> <tr> <th></th> <th>书籍名字</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.date}}</td> <td>{{item.price | toprice}}</td> <td> <button @click="down(index)" :disabled="item.aunt<=1">-</button> {{item.aunt}} <button @click="add(index)">+</button> </td> <td> <button @click="remove(index)">移除</button> </td> </tr> </tbody> </table> <h2>总价：{{getallprice | toprice}}</h2> </div> <h2 v-else>您没有购物信息</h2> </div> <script> const vm = new Vue({ el: "#box", data: { books: [{ id: 1, name: "《vue.js实战》", date: "2010.2.4", price: 82.00, aunt: 1 }, { id: 2, name: "《javascript实战》", date: "2010.2.4", price: 108.00, aunt: 1 }, { id: 3, name: "《html+css实战》", date: "2010.2.4", price: 42.50, aunt: 1 }, { id: 4, name: "《axios实战》", date: "2010.2.4", price: 82.00, aunt: 1 }, { id: 5, name: "《jquery实战》", date: "2010.2.4", price: 65.20, aunt: 1 }, ] }, methods: { add(index) { this.books[index].aunt++; }, down(index) { this.books[index].aunt--; }, remove(index) { this.books.splice(index, 1) }, }, computed: { getallprice() { let all = 0; for (let i = 0; i < this.books.length; i++) { all += this.books[i].price * this.books[i].aunt } return all } }, filters: { toprice(price) { return "￥" + price.toFixed(2) }, } }) </script> </body> </html>
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