[Vssue]vue2-3 - Githubissues

shenghy commented 5 years ago

https://jspang.com/posts/2017/03/26/vue2-3.html

wangqiangqiang999 commented 5 years ago

computed 中改变数组，貌似会影响原数组。。

0154155lizhijian commented 5 years ago

<!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>computed Option 计算选项</title>
  <script src="../assets//js/vue.min.js" type="text/javascript"></script>
</head>

<body>
  <h1>computed Option 计算选项</h1>
  <hr>
  <div id="app">
    <p>{{price}}</p>
    <p>{{newPrice}}</p>
    <ul>
      <li v-for="ne in newsList">
        {{ne.title}} -- {{ne.data}}
      </li>
      <li v-for="news in reverseList">
          {{news.title}} -- {{news.data}}
      </li>
    </ul>

  </div>
  <script type="text/javascript">
    var newsList = [
      { title: '大龙', data: '8分钟' },
      { title: '小龙', data: '3分钟' },
      { title: '风龙', data: '20分钟' },
      { title: '暴君', data: '5分钟' }
    ]
    var app = new Vue({
      el: '#app',
      data: {
        price: 1000,
        newsList: newsList
      },
      computed: {
        newPrice: function () {
          return '￥' + this.price + '元'
        },
        reverseList: function () {
          return this.newsList.reverse();
        }
      }
    });
  </script>
</body>

</html>

可以打印看一下，数组会发生改变。但是字符不会

shenghy / my-blog

[Vssue]vue2-3 #25