html

<!DOCTYPE html>
<html lang="en">
<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>
  <link rel="stylesheet" href="style.css">
</head>
<body>
  <div id="app">
    <div v-if="books.length">
      <table>
        <thead>
          <tr>
            <th>序号</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></th>
          </tr>
        </thead>
        <tbody>
          <tr v-for="(item,index) in books">
            <td>{{index+1}}</td>
            <td>{{item.name}}</td>
            <td>{{item.date}}</td>
            <td>{{item.price | showPrice}}</td>
            <td>
              <button @click="decrement(index)" v-bind:disabled="item.count<=1">-</button>
              {{item.count}}
              <button @click="increment(index)" v-bind:disabled="item.count>=999">+</button>
            </td>
            <td>
              <button @click="removeHandler(index)">删除</button>
            </td>
          </tr>
        </tbody>
      </table>
      <h2>总价格：{{totalPrice | showPrice}}</h2>
    </div>
    <h2 v-else>购物车为空</h2>
  </div>
 <script src="../js/vue.js"></script>
 <script src="main.js"></script>
</body>
</html>

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js

const app = new Vue({
  el: '#app',
  data:{
    // count:0,
    books:[
			{
				id: 1,
				name: '《算法导论》',
				date: '2006-9',
				price: 85.00,
				count: 1
			},
			{
				id: 2,
				name: '《UNIX编程艺术》',
				date: '2006-2',
				price: 59.00,
				count: 1
			},
			{
				id: 3,
				name: '《编程珠玑》',
				date: '2008-10',
				price: 39.00,
				count: 1
			},
			{
				id: 4,
				name: '《代码大全》',
				date: '2006-3',
				price: 128.00,
				count: 1
			},
		]
  },
  //计算属性，函数使用名词进行命名
  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;
    }
  },
  methods: { 
    // getFinalPrice(price){
    //   return '￥' + price.toFixed(2);
    // },
    decrement(index){
      console.log('decrement'+index);
      this.books[index].count--;
    },
    increment(index){
      console.log('increment'+index);
      this.books[index].count++;
    },
    removeHandler(index){
      this.books.splice(index,1);
    }
  },
  // 过滤器
  filters: {
    showPrice(price) {
      return '￥' + price.toFixed(2);
    }
  }
})

循环方式1：
在这里插入图片描述循环方式2：

在这里插入图片描述循环方式3：

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css

table {
  border: 1px solid #e9e9e9;
  border-collapse: collapse;
  border-spacing: 0;
}

th, td {
  padding: 8px 16px;
  border: 1px solid #e9e9e9;
  text-align: left;
}

th {
  background-color: #f7f7f7;
  color: #5c6b77;
  font-weight: 600;
}