Vue.js 的核心是一个响应的数据绑定系统，它让数据与 DOM 保持同步非常简单。Vue.js 拥抱数据驱动的视图概念。通俗地讲，它意味着我们在普通 HTML 模板中使用特殊的语法将 DOM “绑定”到底层数据。一旦创建了绑定，DOM 将与数据保持同步。每当修改了数据，DOM 便相应地更新。这样我们应用中的逻辑就几乎都是直接修改数据了，不必与 DOM 更新搅在一起。这让我们的代码更容易撰写、理解与维护。
html:
1 <!DOCTYPE html>
2 <html lang="en">
3 <head>
4 <meta charset="UTF-8">
5 <title>Document</title>
6 <link rel="stylesheet" type="text/css" href="https://cdn.bootcss.com/bootstrap/3.3.5/css/bootstrap.min.css">
7 <script src="dist/vue.min.js"></script>
8 <style type="text/css">
9 [v-cloak] {
10 display: none;
11 }
12 </style>
13 </head>
14 <body>
15 <div class="container">
16 <div class="col-md-6 col-md-offset-3">
17 <h1>Vue demo</h1>
18
19 <div id="app">
20 <table class="table table-hover ">
21 <caption></caption>
22 <thead>
23 <tr>
24 <th>序号</th>
25 <th>书名</th>
26 <th>作者</th>
27 <th>价格</th>
28 <th>操作</th>
29 </tr>
30 </thead>
31 <tbody>
32 <tr v-cloak v-for="book in books">
33 <td>{{book.id}}</td>
34 <td>{{book.name}}</td>
35 <td>{{book.author}}</td>
36 <td>{{book.price}}</td>
37 <template v-if="book.id%2==0">
38 <td class="text-left">
39 <button type="button" class="btn btn-success" @click="delBook(book)">删除</button>
40 </td>
41 </template>
42 <template v-else>
43 <td class="text-left">
44 <button type="button" class="btn btn-danger" @click="delBook(book)">删除</button>
45 </td>
46 </template>
47 </tr>
48 </tbody>
49
50 </table>
51
52 <div id="add-book">
53
54 <legend>添加书籍</legend>
55
56 <div class="form-group">
57 <label for="">书名</label>
58 <input type="text" class="form-control" v-model="book.name">
59 </div>
60
61 <div class="form-group">
62 <label for="">作者</label>
63 <input type="text" class="form-control" v-model="book.author">
64 </div>
65
66 <div class="form-group">
67 <label for="">价格</label>
68 <input type="text" class="form-control" v-model="book.price">
69 </div>
70
71 <button class="btn btn-primary btn-block" v-on:click="addBook()">添加</button>
72 </div>
73
74 </div>
75
76 </div>
77 </div>
78 <script type="text/javascript" src="1.js"></script>
79 </body>
80 </html>
js
new Vue({
el: '#app',
methods: {
addBook: function() {
//计算书的id
this.book.id = this.books.length + 1;
this.books.push(this.book);
//将input中的数据重置
this.book = {};
},
delBook: function(book) {
var blength = this.books.length;
this.books.splice(book.id-1, 1);
for( var i = 0; i < blength ; i++) {
if(book.id < this.books[i].id) {
this.books[i].id -= 1;
}
}
}
},
data: {
book: {
id: 0,
author: '',
name: '',
price: ''
},
books: [{
id: 1,
author: '曹雪芹',
name: '红楼梦',
price: 32.0
}, {
id: 2,
author: '施耐庵',
name: '水浒传',
price: 30.0
}, {
id: '3',
author: '罗贯中',
name: '三国演义',
price: 24.0
}, {
id: 4,
author: '吴承恩',
name: '西游记',
price: 20.0
}]
}
});