Table of Contents
{{title}}
Home Web Front-end Vue.js What are the five ways to pass values ​​in Vue brother components?

What are the five ways to pass values ​​in Vue brother components?

May 20, 2021 am 11:52 AM
vue Component passing value

The five methods are: 1. The parent component passes the value to the child component; 2. The child component passes the value to the parent component; 3. Define a custom event on the label in the parent component and obtain it inside the event. Parameters; 4. Trigger custom events in sub-components and pass parameters; 5. Pass parameters through the public component Bus.js.

What are the five ways to pass values ​​in Vue brother components?

The operating environment of this tutorial: windows7 system, vue2.9.6 version, DELL G3 computer.

Five ways to pass values ​​in vue components:

1. Parent components pass values ​​to subcomponents:

Bind the parent data to the subcomponent, and the subcomponent passes props accept parameters.

Next we use an example to illustrate how the parent component transfers values ​​​​to the child component: how to obtain the data in the parent component App.vue in the child component Users.vue users:["Henry","Bucky" ,"Emily"]

//App.vue父组件
<template>
  <div id="app">
    <users v-bind:users="users"></users>//前者自定义名称便于子组件调用,后者要传递数据名
  </div>
</template>
<script>
import Users from "./components/Users"
export default {
  name: &#39;App&#39;,
  data(){
    return{
      users:["Henry","Bucky","Emily"]
    }
  },
  components:{
    "users":Users
  }
}
Copy after login
//users子组件
<template>
  <div class="hello">
    <ul>
      <li v-for="user in users">{{user}}</li>//遍历传递过来的值,然后呈现到页面
    </ul>
  </div>
</template>
<script>
export default {
  name: &#39;HelloWorld&#39;,
  props:{
    users:{           //这个就是父组件中子标签自定义名字
      type:Array,
      required:true
    }
  }
}
</script>
Copy after login

2. The child component passes the value to the parent component:

Set the data to be transferred in the parent component 『data(){ id: value}』

Next, we use an example to illustrate how the sub-component passes a value to the parent component: when we click "Vue.js Demo", the sub-component passes the value to the parent component, and the text changes from the original "A value is passed" It becomes "child passes value to parent component" to realize the transfer of value from child component to parent component.

What are the five ways to pass values ​​in Vue brother components?

// 子组件
<template>
  <header>
    <h1 id="title">{{title}}</h1>//绑定一个点击事件
  </header>
</template>
<script>
export default {
  name: &#39;app-header&#39;,
  data() {
    return {
      title:"Vue.js Demo"
    }
  },
  methods:{
    changeTitle() {
      this.$emit("titleChanged","子向父组件传值");//自定义事件  传递值“子向父组件传值”
    }
  }
}
</script>
Copy after login
// 父组件
<template>
  <div id="app">
    <app-header v-on:titleChanged="updateTitle" ></app-header>//与子组件titleChanged自定义事件保持一致
   // updateTitle($event)接受传递过来的文字
    <h2 id="title">{{title}}</h2>
  </div>
</template>
<script>
import Header from "./components/Header"
export default {
  name: &#39;App&#39;,
  data(){
    return{
      title:"传递的是一个值"
    }
  },
  methods:{
    updateTitle(e){   //声明这个函数
      this.title = e;
    }
  },
  components:{
   "app-header":Header,
  }
}
</script>
Copy after login

3. Define a custom event on the label in the parent component and get the parameters inside the event;

4. Trigger the custom event in the child component event and pass parameters. (this.$ emit('Custom event in parent component', parameters))

5. Pass parameters through the public component Bus.js

[Related recommendations: "vue.js tutorial》】

The above is the detailed content of What are the five ways to pass values ​​in Vue brother components?. For more information, please follow other related articles on the PHP Chinese website!

Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

How to use bootstrap in vue How to use bootstrap in vue Apr 07, 2025 pm 11:33 PM

Using Bootstrap in Vue.js is divided into five steps: Install Bootstrap. Import Bootstrap in main.js. Use the Bootstrap component directly in the template. Optional: Custom style. Optional: Use plug-ins.

How to add functions to buttons for vue How to add functions to buttons for vue Apr 08, 2025 am 08:51 AM

You can add a function to the Vue button by binding the button in the HTML template to a method. Define the method and write function logic in the Vue instance.

How to reference js file with vue.js How to reference js file with vue.js Apr 07, 2025 pm 11:27 PM

There are three ways to refer to JS files in Vue.js: directly specify the path using the &lt;script&gt; tag;; dynamic import using the mounted() lifecycle hook; and importing through the Vuex state management library.

How to use watch in vue How to use watch in vue Apr 07, 2025 pm 11:36 PM

The watch option in Vue.js allows developers to listen for changes in specific data. When the data changes, watch triggers a callback function to perform update views or other tasks. Its configuration options include immediate, which specifies whether to execute a callback immediately, and deep, which specifies whether to recursively listen to changes to objects or arrays.

What does vue multi-page development mean? What does vue multi-page development mean? Apr 07, 2025 pm 11:57 PM

Vue multi-page development is a way to build applications using the Vue.js framework, where the application is divided into separate pages: Code Maintenance: Splitting the application into multiple pages can make the code easier to manage and maintain. Modularity: Each page can be used as a separate module for easy reuse and replacement. Simple routing: Navigation between pages can be managed through simple routing configuration. SEO Optimization: Each page has its own URL, which helps SEO.

How to return to previous page by vue How to return to previous page by vue Apr 07, 2025 pm 11:30 PM

Vue.js has four methods to return to the previous page: $router.go(-1)$router.back() uses &lt;router-link to=&quot;/&quot; component window.history.back(), and the method selection depends on the scene.

How to use vue traversal How to use vue traversal Apr 07, 2025 pm 11:48 PM

There are three common methods for Vue.js to traverse arrays and objects: the v-for directive is used to traverse each element and render templates; the v-bind directive can be used with v-for to dynamically set attribute values ​​for each element; and the .map method can convert array elements into new arrays.

How to query the version of vue How to query the version of vue Apr 07, 2025 pm 11:24 PM

You can query the Vue version by using Vue Devtools to view the Vue tab in the browser's console. Use npm to run the "npm list -g vue" command. Find the Vue item in the "dependencies" object of the package.json file. For Vue CLI projects, run the "vue --version" command. Check the version information in the &lt;script&gt; tag in the HTML file that refers to the Vue file.

See all articles