1.vue简介
简化Dom操作
2.vue指令
(1)v-for="" 循环操作
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
</head>
<body>
<div id="idsd">
{{msg}}
{{gsd}}
{{mgh}}
{{obj}}
</div>
<script src="js/vue.js"></script>
<script>
new Vue({
el:"#idsd",
data:{
msg:'hello world',
gsd:456,
mgh:[12,12,12,1231,2],
obj:{
name:'名字'
}
}
})
</script>
</body>
</html>
(2)v-model="" 双向数据绑定 用于表单元素
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
</head>
<body>
<div class="qwe">
<input type="text" v-model="msg">
<p>{{msg}}</p>
</div>
<script src="js/vue.js"></script>
<script>
new Vue({
el:".qwe",
data:{
msg:"hello world"
}
})
</body>
</html>
(3)v-on:事件="函数名" 绑定事件 简写 @事件=""
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
</head>
<body>
<div class="zxc">
<button v-on:click="alt">点击</button>
</div>
<script src="js/vue.js"></script>
<script>
new Vue({
el:".zxc",
data:{
msg:"hello world"
},
methods:{//methods 存放函数（方法）
alt:function(){
console.log(this.msg);
}
}
})
</body>
</html>
(4)v-show="" 控制元素的显示或隐藏 display:none
显示
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
</head>
<body>
<div id="itany">
<p v-show="!see">{{meg}}</p>
</div>
<script src="js/vue.js"></script>
<script>
new Vue({
el:"#itany",
data:{
meg:"hellow",
see:true
}
})
</script>
</body>
</html>
v-show 隐藏
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<style>
p{
width: 100px;
height: 100px;
background: red;
}
</style>
</head>
<body>
<div id="itany">
<button v-on:click="alt">点击隐藏</button>
<p v-show="see"></p>
</div>
<script src="js/vue.js"></script>
<script>
new Vue({
el:"#itany",
data:{
see:true
},
methods:{
alt:function(){
if(this.see==true){
this.see=false;
}else{
this.see=true;
}
}
}
})
</script>
</body>
</html>
(5)v-if="" 控制元素的显示或隐藏 visibility:hidden;
v-else
v-else-if
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
</head>
<body>
<div id='itany'>
<p v-if="num==0">0000000000000000</p>
<p v-else-if="num==1">111111111111</p>
<p v-else-if="num==2">2222222222222</p>
<p v-else-if="num==3">333333333333</p>
<p v-else-if="num==4">444444444444</p>
<p v-else='num==5'>55555555555555555</p>
</div>
<script src='js/vue.js'></script>
<script>
new Vue({
el:'#itany',
data:{
// num:Math.floor(Math.random()*(max-min+1)+min)
num:Math.floor(Math.random()*(5-0+1)+0)
}
})
</body>
</html>
(6)v-bind:属性='值' 绑定属性 简写 :属性='值'
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>DocumentDocument</title>
</head>
<body>
<div id='itany'>
<!-- <a href=""></a>-->
<img v-bind:src="url" alt="">
</div>
<script src='js/vue.js'></script>
<script>
new Vue({
el:'#itany',
data:{
url:'img/1.jpg'
}
})
</script>
</body>
</html>
(7)v-text 不可以解析标签
v-html 可以解析标签
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
</head>
<body>
<div id='app'>
<input type="text" v-model='msg'>
<p v-html='msg'>{{msg}}</p>
<h3 v-text='msg'>{{msg}}</h3>
<a href="#" v-once>{{msg}}</a> <br>
<a href="#" v-pre>{{msg}}</a>
</div>
<script src='js/vue.js'></script>
<script>
new Vue({
el:'#app',
data:{
msg:'今天周六，照常上课'
}
})
</script>
</body>
</html>
(8)v-once 只绑定一次
v-pre 原样输出
(10)v-cloak
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<style>
[v-cloak]{
display:none;
}
</style>
</head>
<body>
<div id='app'>
<h1 v-cloak>{{msg}}</h1>
</div>
<script src='js/vue.js'></script>
<script>
new Vue({
el:'#app',
data:{
msg:'hellovue'
},
beforeMount:function(){
alert(1111)
}
})
</script>
</body>
</html>
3.vue过滤器
全局:
Vue.filter('过滤器的名字',function(data){
return
})
局部:
filters:{
过滤器的名字:function(data){
return
}
}
4.vue计算属性
处理复杂逻辑操作
computed:{
名字：function(){
return // 逻辑操作
}
}
5.vue中的组件
作用：
1.扩张html元素
2.封装可重用的代码
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
</head>
<body>
<div id='app'>
<my-component></my-component>
</div>
<script src='js/vue.js'></script>
<script>
Vue.component('my-component',{
template:`
<div>
<p>{{mess}}</p>
<button @click='alt'>按钮</button>
</div>
`,
data:function(){
return{
mess:'我是组件中的值'
}
},
methods:{
alt:function(){
alert('bdsjjf')
}
}
})
new Vue({
el:"#app",
data:{
msg:'jsdkvg'
},
methods:{
}
})
</script>
</body>
</html>
6.组件之间的传值(难，重)
1.父传子 用属性 props:['属性']
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
</head>
<body>
<div id='app'>
<my-father></my-father>
</div>
<script src='js/vue.js'></script>
<script>
Vue.component('my-father',{
template:`
<div>
<my-tit v-bind:tit='title'></my-tit>
<my-fruit v-bind:fruList='list'></my-fruit>
</div>
`,
data:function(){
return{
list:['apple','pear','banana'],
title:'水果列表'
}
}
})
Vue.component('my-tit',{
props:['tit'],
template:`
<h2>{{tit}}</h2>
`
})
Vue.component('my-fruit',{
props:['fruList'],
template:`
<ul>
<li v-for="value in fruList">{{value}}</li>
</ul>
`
})
new Vue({
el:'#app'
})
</script>
</body>
</html>
2.子传父 用事件传 $emit
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
</head>
<body>
<div id="app">
<my-father></my-father>
</div>
<script src="js/vue.js"></script>
<script>
Vue.component("my-father",{
template:`
<div>
<my-child @send="reg"></my-child>
<a href="#">{{mess}}</a>
</div>
`,
data:function(){
return{
mess:''
}
},
methods:{
reg:function(txt){
this.mess=txt
}
}
})
Vue.component("my-child",{
template:`
<button @click="alt">按钮</button>
`,
data:function(){
return{
msg:"我是自组建中的元素，要传到福组建中"
}
},
methods:{
alt:function(){
// this.$emit('事件',参数)
this.$emit('send',this.msg)
}
}
})
new Vue({
el:"#app"
})
</script>
</body>
</html>
3.非父子 借助中间量
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
</head>
<body>
<div id="app">
<child></child>
<brother></brother>
</div>
<script src="js/vue.js"></script>
<script>
var bus=new Vue();
Vue.component('child',{
template:`
<div>
<h2>我是child组件中的数据</h2>
<button @click="fasong">发送数据</button>
</div>
`,
data:function(){
return{
mes:'我是child组件中的数据，传到brother'
}
},
methods:{
fasong:function(){
bus.$emit('send',this.mes)
}
}
})
Vue.component('brother',{
template:`
<div>
<h2>我是brother组件中的数据</h2>
<a href="#">{{res}}</a>
</div>
`,
data:function(){
return{
res:''
}
},
mounted:function(){
bus.$on('send',mes=>{
this.res=mes
})
}
})
new Vue({
el:"#app"
})
</script>
</body>
</html>
