Vue implements a simple shopping cart example

This article example shares the specific code of Vue to implement a simple shopping cart for your reference. The specific content is as follows

Code:

<!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>Book Title</th>
          <th>Publication Date</th>
          <th>Price</th>
          <th>Purchase quantity</th>
          <th>Operation</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)'>Remove</button>
          </td>
        </tr>
      </tbody>
    </table>
    <h2 v-if='books!=""'>Total price:{{theSumOf | getFinalPrice}}</h2>
    <h2 v-else>Shopping cart is empty</h2>
  </div>
</body>
<script src="../js/vue.min.js"></script>
<script>
  var app = new Vue({
    el: '#app',
    data: {
      books:
        {
          id: 1,
          name: 'Computer Applications',
          date: '2006-9',
          price: 85.00,
          count: 1

        },
        {
          id: 2,
          name: 'java application',
          date: '2006-9',
          price: 10.00,
          count: 1

        },
        {
          id: 3,
          name: 'Big Data',
          date: '2006-9',
          price: 85.00,
          count: 1

        },
        {
          id: 4,
          name: 'ui designer',
          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 () {
      //The first method of cumulative calculation //let sum = 0
        //this.books.forEach(item => {
        // sum += parseInt(item.price)*parseInt(item.count)
        });
        //return sum

 //The second way of cumulative calculation //let sum = 0
 //for(let i in this.books){
  //sum += this.books[i].price*this.books[i]*count
 }
 //return sum

 //The third way of cumulative calculation //let sum = 0
 //for(let item of this.books){
 //sum += item.price*item.count
 //}
 //return sum

 //The fourth method of cumulative calculation return this.books.reduce(function(preValue,book){
 return preValue + book.price*book.count
 },0)
      }

    },
    filters:
      getFinalPrice(price) {
        return '￥' + price.toFixed(2)
      },
    }
  });
</script>

<html>

Regarding the learning tutorial of vue.js, please click on the special topics vue.js component learning tutorial and Vue.js front-end component learning tutorial for learning.

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