今天学习了Vue组件中的非父子之间的传值和生命周期
Vue组件之间的传值分三种
1.父传子之间传值用属性:props
2.子传父之间传值用方法:自定义方法
3.非父子之间传值用第三方。
非父子之间传值实例
<body>
<div id="demo">
<first></first>
<second></second>
</div>
<script src="js/vue.js"></script>
<script>
var bus=new Vue();
Vue.component('first',{
template:`
<div>
<h2>4987489789<h2>
<button @click='btn'>点击</button>
</div>
`,
data:function(){
return{
msg:'hellow word'
}
},
methods:{
btn:function(){
bus.$emit('send',this.msg)
}
}
})
Vue.component('second',{
template:`
<div>
<h2>sdafsdfs</h2>
<a href="">{{mess}}</a>
</div>
`,
data:function(){
return{
mess:''
}
},
mounted:function(){
bus.$on('send',msg=>{
this.mess=msg
})
}
})
new Vue({
el:'#demo'
})
</script>
</body>
生命周期
生命周期分8个阶段
1.beforeCreate(创建前)
2.created(创建后)
3.beforeMount(载入前)
4.mounted(载入后)
5.beforeUpdate(更新前)
6.updated(更新后)
7.beforeDestroy(销毁前)
8.destroyed(销毁后)
实例
<body>
<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>
</body>
作业(昨天)
父子组件通信
<body>
<div id="demo">
<lzy></lzy>
</div>
<script src="js/vue.js"></script>
<script>
Vue.component('lzy',{
template:`
<div>
<ul>
<li v-for='(value,index) in arr'>{{value}}</li>
</ul>
<cont @send='newBtn' addName='jake'></cont>
<cont @send='newBtn' addName='jan'></cont>
</div>
`,
data:function(){
return{
arr:[]
}
},
methods:{
newBtn:function(txt){
this.arr.push(txt)
}
}
})
Vue.component('cont',{
props:['addName'],
template:`
<div>
<label>{{addName}}</label>
<input type="text" v-model='add'>
<button @click='btn'>点击</button>
</div>
`,
data:function(){
return{
add:''
}
},
methods:{
btn:function(){
this.$emit('send',this.addName+':'+this.add)
}
}
})
new Vue({
el:'#demo'
})
</script>
</body>