遍历普通数组
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document
</title>
<script src="../lib/vue.js"></script>
</head>
<body>
<div id="app">
<p v-for="(item,i) in list">索引值：{{i}}---每一项：{{item}}
</p>
</div>
<script>
var vm = new Vue({
el: "#app",
data: {
list:[1,2,3,4,5,6],
},
methods: {
}
})
</script>
</body>
</html>
遍历对象数组
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document
</title>
<script src="../lib/vue.js"></script>
</head>
<body>
<div id="app">
<p v-for="(user,i) in list">索引值：{{i}}---ID：{{user.id}}---name:{{user.name}}
</p>
</div>
<script>
var vm = new Vue({
el: "#app",
data: {
list:[
{id:1,name:'ajax'},
{id:2,name:'json'},
{id:3,name:'html'},
{id:4,name:'vue'},
{id:5,name:'html'}
]
},
methods: {
}
})
</script>
</body>
</html>
遍历对象
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document
</title>
<script src="../lib/vue.js"></script>
</head>
<body>
<div id="app">
<p v-for="(val,key,i) in list">值：{{val}}---键：{{key}}---id:{{i}}
</p>
</div>
<script>
var vm = new Vue({
el: "#app",
data: {
list:{
name:"马云",
age:18,
class:1,
}
},
methods: {
}
})
</script>
</body>
</html>
迭代数字
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document
</title>
<script src="../lib/vue.js"></script>
</head>
<body>
<div id="app">
<p v-for="(count) in 10">这是第{{count}}次循环
</p>
</div>
<script>
var vm = new Vue({
el: "#app",
data: {
},
methods: {
}
})
</script>
</body>
</html>
key的用法
因为vue中它默认使用“就地更新”的策略，最少化的渲染。此时为了给 Vue 一个提示，以便它能跟踪每个节点的身份，从而重用和重新排序现有元素，你需要为每项提供一个唯一 key 属性。
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document
</title>
<script src="../lib/vue.js"></script>
</head>
<body>
<div id="app">
id:
<input type="text" v-model="id">
name:
<input type="text" v-model="name">
<input type="button" value="添加" @click="add">
<p v-for="item in list" v-bind:key="item.id">
<input type="checkbox">
id:{{item.id}}---名字:{{item.name}}
</p>
</div>
var vm = new Vue({
el: "#app",
data: {
id:'',
name:'',
list:[
{id:1,name:'李斯'},
{id:2,name:'赵高'},
{id:3,name:'秦始皇'},
{id:4,name:'李白'},
{id:5,name:'赵飞'},
]
},
methods: {
add(){
this.list.unshift({id:this.id,name:this.name})
}
}
})
</script>
</body>
</html>
