1.子传父通信
<div id="app">
<chat></chat>
</div>
<script src="../js/vue.js"></script>
<script>
Vue.component("chat",{
template:`
<div>
<ul>
<li v-for="value in arr">{{value}}</li>
</ul>
<user @send='revMsg' userName="Jack"></user>
<user @send='revMsg' userName="rose"></user>
</div>
`,
data:function(){
return{
arr:[]
}
},
methods:{
revMsg:function(txt){
this.arr.push(txt)
}
}
}),
Vue.component('user',{
props:['userName'],
template:`
<div>
<label>{{userName}}</label>
<input type='text' v-model='inputVal'>
<button @click='sendMsg'>发送</button>
</div>
`,
data:function(){
return{
inputVal:''
}
},
methods:{
sendMsg:function(){
this.$emit('send',this.userName+':'+this.inputVal)
this.inputVal=''
}
}
})
new Vue({
el:"#app"
})
</script>
效果如下：
Image 1.png
2.非父子之间传值
<div id="app">
<child></child>
<son></son>
</div>
<script src="../js/vue.js"></script>
<script>
var bus=new Vue()
Vue.component('child',{// A
template:`
<div>
<h1>我是child组件</h1>
<button @click='sendMsg'>发送数据给son</button>
</div>
`,
data:function(){
return{
msg:' Hello Vue'
}
},
methods:{
sendMsg:function(){
bus.$emit('send',this.msg)
}
}
})
Vue.component('son',{//B
template:`
<div>
<h1>我是son组件</h1>
<a href="">{{mess}}</a>
</div>
`,
data:function(){
return{
mess:''
}
},
mounted:function(){
bus.$on('send',msg=>{//箭头函数
/*console.log(this);*/
this.mess=msg
})
}
})
new Vue({
el:'#app'
})
</script>
效果如下：
Image 1.png
3.生命周期
<div id='app'>{{msg}}</div>
<script src='../js/vue.js'></script>
<script>
new Vue({
el:'#app',
data:{
msg:'hello vue'
},
beforeCreate:function(){
alert('beforeCreated');
},
created:function(){
alert('created')
},
beforeMount:function(){
alert('beforMount')
},
mounted:function(){
alert('mounted')
}
})
</script>
