v-for即for循环
- 如果遍历的对象是数组，表达式的格式为：（T，index） in List<T>，其中T是对象类型；如果遍历的目标是对象，表达式的格式为：（v,k,i）in T ,其中v是键的值，k是键，i是索引，T是对象
v-if表示判断
- 当表达式为true是展示标签内容，false时不展示
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<script src="./[email protected]@vue/dist/vue.js"></script>
<div id="app">
<ul>
<li v-for="(people,index) in peopleArry">
index:{
{index}},name={
{people.name}},age={
{people.age}}<br>
对象键值对:
<span v-for="(v,k) in people">
{
{k}}={
{v}}
</span>
</li>
<li v-for="num in numArry">
<span v-if="num%2==0">
偶数:{
{num}}
</span>
<span v-if="num%2==1">
奇数:{
{num}}
</span>
</li>
</ul>
</div>
<script>
let app = new Vue({
el: '#app',
data: {
peopleArry: [{ name: 'a', age: 1 }, { name: 'b', age: 2 }, { name: 'c', age: 3 }],
numArry: [1, 2, 3, 4, 5, 6]
}
})
</script>
</body>
</html>