test20200527/listrendering.html at master · wangsy20175113/test20200527 · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
	</head>
	<body>
		<div id="app">
			<ul>
				<li v-for="(item, index) in items" :key="item.message">
					{{index}} | {{item.message}}
				</li>
			</ul>

			<ul id="v-for-object" class="demo">
			  <li v-for="value in object">
			    {{ value }}
			  </li>
			</ul>

			<button type="button" @click="changev">change array element</button>

			<ul>
				<li v-for="item in evenNumber">
					{{item}}
				</li>
			</ul>
		</div>

		<script type="text/javascript">
			var app = new Vue({
				el:"#app",
				data:{
					numbers:[1,2,3,4,5],
					 parentMessage: 'Parent',
					    items: [
					      { message: 'Foo' },
					      { message: 'Bar' }
					    ],
						 object: {
						      title: 'How to do lists in Vue',
						      author: 'Jane Doe',
						      publishedAt: '2016-04-10'
						    }
				},
				computed:{
					evenNumber()
					{
						return this.numbers.filter(function(item){
							return item%2==0
						})
					}
				},
				methods:{
					changev()
					{
						Vue.set(this.items,0,{message:'xxx'})
					}
				}

			})
		</script>
	</body>
</html>