vue中通信方式
- vuex中共享state
- 父子组件emit/on
- 跨组件event bus
跨组件eventbus通信
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title></title>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/animate.css/3.5.2/animate.min.css">
<style>
</style>
</head>
<body>
<div id="todo-app">
<h1>todo app</h1>
<new-todo></new-todo>
<todo-list></todo-list>
</div>
</body>
<script src="https://unpkg.com/vue/dist/vue.js"></script>
<script type="text/javascript">
var eventHub = new Vue({
data() {
return{
todos:['A','B','C']
}
},
created:function () {
this.$on('add', this.addTodo)
this.$on('delete', this.deleteTodo)
},
beforeDestroy:function () {
this.$off('add', this.addTodo)
this.$off('delete', this.deleteTodo)
},
methods: {
addTodo: function (newTodo) {
this.todos.push(newTodo)
},
deleteTodo: function (i) {this.todos.splice(i,1)
}
}
})
var newTodo={
template: '<div><input type="text" autofocus v-model="newtodo"/><button @click="add">add</button></div>',
data() {
return {
newtodo: ''
}
},
methods: {
add: function(){
eventHub.$emit('add',this.newtodo);
this.newtodo='';
}
}
}
var todoList = {
template:`<ul><li v-for="(index,item) in items">{{index}} \
<button @click="rm(item)">X</button></li> \
</ul>`,
data(){
return{
items:eventHub.todos
}
},
methods:{
rm:function(i){
eventHub.$emit('delete',i)
}
}
}
var app= new Vue({
el:'#todo-app',
components:{
newTodo:newTodo,
todoList:todoList
}
})
</script>
</html>
