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Detailed explanation of event bus non-parent-child component communication in vue
Detailed explanation of event bus non-parent-child component communication in vue
This article mainly introduces the communication analysis of event bus non-parent-child components in vue. The editor thinks it is quite good. Now I will share it with you and give it a reference. Let’s follow the editor to take a look, I hope it can help everyone.
Sometimes components with non-parent-child relationships also need to communicate. In simple scenarios, use an empty Vue instance as the central event bus:
var bus = new Vue()
// 触发组件 A 中的事件
bus.$emit('id-selected', 1)
// 在组件 B 创建的钩子中监听事件
bus.$on('id-selected', function (id) {
// ...
}) In more complex cases, you should consider using a dedicated state management pattern .Is using vuex
eventBus is used as a communication intermediary between components in a sibling relationship.
Code example:
##
<!DOCTYPE html>
<html>
<head>
<title>eventBus</title>
<script src="http://cdn.jsdelivr.net/vue/1.0.28/vue.min.js"></script>
</head>
<body>
<p id="todo-app">
<h1>todo app</h1>
<new-todo></new-todo>
<todo-list></todo-list>
</p>
<script>
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:`<p><input type="text" autofocus v-model="newtodo"/><button @click="add">add</button></p>`,
data(){
return{
newtodo:''
}
},
methods:{
add:function(){
eventHub.$emit('add', this.newtodo)
this.newtodo = ''
}
}
}
var todoList = {
template:`<ul><li v-for="(index,item) in items">{{item}} \
<button @click="rm(index)">X</button></li> \
</ul>`,
data(){
return{
items:eventHub.todos
}
},
methods:{
rm:function(i){
eventHub.$emit('delete',i)
}
}
}
var app= new Vue({
el:'#todo-app',
components:{
newTodo:newTodo,
todoList:todoList
}
})
</script>
</body>
</html>
How to solve the problem of eventbus being triggered multiple times in vue
Detailed explanation of the difference between this and event in JS
Guava eventbus example code detailed explanation
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