vue:實現圖書購物車
阿新 • • 發佈:2020-07-25
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>圖書購物車</title> <script src="vue/vue.js"></script> <style> table { border: 1px solid #e9e9e9; border-collapse: collapse; border-spacing: 0; } th, td { padding: 0px 16px; border: 1px solid #e9e9e9; text-align: left; } th { background-color: #f7f7f7; color: #5c6b77; font-weight: 600; } </style> </head> <body> <div id="app"> <div v-if="books.length"> <table> <thead> <tr> <th></th> <th>書籍名稱</th> <th>出版日期</th> <th>價格</th> <th>購買數量</th> <th>操作</th> </tr> </thead> <tbody> <tr v-for="(b, index) in books"> <td>{{b.id}}</td> <td>{{b.name}}</td> <td>{{b.date}}</td> <td>{{b.price | showPrice}}</td> <td> <button :disabled="b.count <= 0" @click="decrement(index)">-</button> {{b.count}} <button @click="increment(index)">+</button> </td> <td><button @click="removeHandle(index)">移除</button></td> </tr> </tbody> </table> <h2>總價格: {{totalPrice}}</h2> </div> <h2 v-else>購物車為空</h2> </div> <script> const app = new Vue({ el: "#app", data: { books: [ { id: 1, name: "《演算法導論》", date: "2006-9", price: 85.00, count: 0 }, { id: 2, name: "《UNIX程式設計藝術》", date: "2006-2", price: 59.00, count: 0 }, { id: 3, name: "《程式設計珠璣》", date: "2008-10", price: 39.00, count: 0 }, { id: 4, name: "《演算法導論》", date: "2006-9", price: 85.00, count: 0 }, ] }, methods: { increment(index) { this.books[index].count += 1; }, decrement(index) { this.books[index].count -= 1; }, removeHandle(index) { this.books.splice(index, 1); } }, computed: { totalPrice() { let totalPrice = 0; for (let i = 0; i<this.books.length; i++) { totalPrice += this.books[i].price * this.books[i].count; } return totalPrice } }, filters: { showPrice(price) { return "¥" + price.toFixed(2); } } }) </script> </body> </html>