vue comprehensive component communication use case
This time I will bring you a use case of vue comprehensive component communication. What are the precautions when using vue comprehensive component communication. The following is a practical case, let's take a look.
The example in this article shares the communication between vue comprehensive components for your reference. The specific content is as follows
Implement a ToDoList.
①Complete the creation and use of all components
②add
When the add button is clicked, the content entered by the user (todoinput) is displayed in (todolist)
Core code: Communication between sibling components
Step 1: var bus = new Vue()
Step 2: In the component that is ready to receive data
bus.$on('addEvent',function(){
})Step 3: Trigger event
bus.$emit('addEvent',123)Render the elements of array in todolist in each span tag of todoitem. (Parent-child component communication)
When you click the delete button in a todoitem, the todoitem will be deleted because the number of todoitem depends on the array
in the todolist. Communication between child component and parent component:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<script src="js/vue.js"></script>
<script src="js/vue-resource.js"></script>
</head>
<body>
<p id="container">
<p>{{msg}}</p>
<todobox></todobox>
</p>
<script>
<!--兄弟间通信-->
var bus = new Vue();
// input组件
Vue.component("todoinput",{
// 保存用户输入的数据
data:function(){
return{
userInput:""
}
},
methods:{
sendInput:function(){
// 触发自定义事件，将this.userInput这个传递到todolist
bus.$emit("addEvent",this.userInput);
this.userInput = "";
}
},
template: `
<p>
<h1>待做事项</h1>
<input type="text" placeholder="健身" v-model="userInput"/>
<button @click="sendInput">Add</button>
</p>
`
})
// 列表组件
Vue.component("todolist",{
// 保存传递来的用户输入的数据
data:function(){
return{
inputList:[]
}
},
beforeMount:function(){
// 触发绑定
// msg就是事件触发后传递过来的数据
//var that = this;
bus.$on("addEvent",(msg)=>{
// 保存到数组inputList中
this.inputList.push (msg) ;
})
},
template: `
<p>
<ul>
<todoitem v-bind:content="tmp" v-for="(tmp,index) in inputList" v-bind:key="index" v-bind:myIndex="index"></todoitem>
</ul>
</p>
`
// 出现警告，加下标，提高列表渲染
})
// item组件
Vue.component("todoitem",{
// props子组件获取父组件的数据，将todolist中的内容以及内容的下标获取
props:["content","myIndex"],
methods:{
// 通过下标删除
deleteList:function(){
this.$parent.inputList.splice(this.myIndex,1);
}
},
template: `
<p>
<li>
<button @click="deleteList">delete</button>
<span>{{content}}</span>
</li>
</p>
`
})
//根组件
Vue.component("todobox",{
template:`
<p>
<todoinput></todoinput>
<todolist></todolist>
</p>
`
})
new Vue({
el: "#container",
data: {
msg: "Hello Vue"
}
})
</script>
</body>
</html>I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the php Chinese website!
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The above is the detailed content of vue comprehensive component communication use case. For more information, please follow other related articles on the PHP Chinese website!
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