What methods do Vue parent components use to call child components?
This time I will bring you what are the methods for the vue parent component to call the subcomponent, and what are the precautions for the vue parent component to call the subcomponent. The following is a practical case, let's take a look.
Scenario:
Introducing the sub-component of Upload attachments into the parent component: Click on the component to upload the corresponding requirements respectively Pictures, sub-component internal loops can create multiple modules.
The parent component passes an array into the sub-component loop to create different component modules, and alleventsare inside the sub-components.
There is also an upload image button at the top of the parent component page. After uploading the image, it will be displayed in the first module:
Imagine Idea: Click the button in the parent component to trigger the upload method in the child component:
Define ref="refName" on the child component, use this.$refs in the method of the parent component .refName.methodTo call the subcomponent method
The method of processing upload in the subcomponent:
fileClick(index) {
console.log('子组件的fileClick被调用了')
console.log('index: '+index)
// this.aaa();
if(!this.fileInfor[index].imgUrl){
//如果当前框里没有图片,则实现上传
document.getElementsByClassName('upload_file')[index].click();
}
},The parent component template
<template> <x-button type="submit" class="custom-primary" @click.native="xiechengUpload">上传图片</x-button> <up-load :fileInformation="fileInformation" ref="uploadRef"></up-load> </template>
The method defined in the parent component method, At the same time, pass in the corresponding index value.
Upload(){
// console.log('父组件的xiechengUpload被调用了')
this.$refs.uploadRef.fileClick(0);
},At this time, you can put the image into the first module of the subcomponent through the upload button.
See below Next, Vue parent component calls child component events
Vue parent component passes events/calls events to child components
It is not about passing data (props), it is suitable for Vue 2.0
Method 1: The child component listens to the method sent by the parent component
Method 2: The parent component calls the child component method
Child component:
export default {
mounted: function () {
this.$nextTick(function () {
this.$on('childMethod', function () {
console.log('监听成功')
})
})
}，
methods {
callMethod () {
console.log('调用成功')
}
}
}Parent component:
<child ref="child" @click="click"></child>
export default {
methods: {
click () {
this.$refs.child.$emit('childMethod') // 方法1
this.$refs.child.callMethod() // 方法2
},
components: {
child: child
}
}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!
Recommended reading:
How to achieve result highlighting during global search
Angular4’s router attribute use case detailed explanation
The above is the detailed content of What methods do Vue parent components use to call child components?. For more information, please follow other related articles on the PHP Chinese website!
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
AI Hentai Generator
Generate AI Hentai for free.
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
How to delete WeChat friends? How to delete WeChat friends
Mar 04, 2024 am 11:10 AM
WeChat is one of the mainstream chat tools. We can meet new friends, contact old friends and maintain the friendship between friends through WeChat. Just as there is no such thing as a banquet that never ends, disagreements will inevitably occur when people get along with each other. When a person extremely affects your mood, or you find that your views are inconsistent when you get along, and you can no longer communicate, then we may need to delete WeChat friends. How to delete WeChat friends? The first step to delete WeChat friends: tap [Address Book] on the main WeChat interface; the second step: click on the friend you want to delete and enter [Details]; the third step: click [...] in the upper right corner; Step 4: Click [Delete] below; Step 5: After understanding the page prompts, click [Delete Contact]; Warm
How to write a novel in the Tomato Free Novel app. Share the tutorial on how to write a novel in Tomato Novel.
Mar 28, 2024 pm 12:50 PM
Tomato Novel is a very popular novel reading software. We often have new novels and comics to read in Tomato Novel. Every novel and comic is very interesting. Many friends also want to write novels. Earn pocket money and edit the content of the novel you want to write into text. So how do we write the novel in it? My friends don’t know, so let’s go to this site together. Let’s take some time to look at an introduction to how to write a novel. Share the Tomato novel tutorial on how to write a novel. 1. First open the Tomato free novel app on your mobile phone and click on Personal Center - Writer Center. 2. Jump to the Tomato Writer Assistant page - click on Create a new book at the end of the novel.
How to enter bios on Colorful motherboard? Teach you two methods
Mar 13, 2024 pm 06:01 PM
Colorful motherboards enjoy high popularity and market share in the Chinese domestic market, but some users of Colorful motherboards still don’t know how to enter the bios for settings? In response to this situation, the editor has specially brought you two methods to enter the colorful motherboard bios. Come and try it! Method 1: Use the U disk startup shortcut key to directly enter the U disk installation system. The shortcut key for the Colorful motherboard to start the U disk with one click is ESC or F11. First, use Black Shark Installation Master to create a Black Shark U disk boot disk, and then turn on the computer. When you see the startup screen, continuously press the ESC or F11 key on the keyboard to enter a window for sequential selection of startup items. Move the cursor to the place where "USB" is displayed, and then
How to recover deleted contacts on WeChat (simple tutorial tells you how to recover deleted contacts)
May 01, 2024 pm 12:01 PM
Unfortunately, people often delete certain contacts accidentally for some reasons. WeChat is a widely used social software. To help users solve this problem, this article will introduce how to retrieve deleted contacts in a simple way. 1. Understand the WeChat contact deletion mechanism. This provides us with the possibility to retrieve deleted contacts. The contact deletion mechanism in WeChat removes them from the address book, but does not delete them completely. 2. Use WeChat’s built-in “Contact Book Recovery” function. WeChat provides “Contact Book Recovery” to save time and energy. Users can quickly retrieve previously deleted contacts through this function. 3. Enter the WeChat settings page and click the lower right corner, open the WeChat application "Me" and click the settings icon in the upper right corner to enter the settings page.
Summary of methods to obtain administrator rights in Win11
Mar 09, 2024 am 08:45 AM
A summary of how to obtain Win11 administrator rights. In the Windows 11 operating system, administrator rights are one of the very important permissions that allow users to perform various operations on the system. Sometimes, we may need to obtain administrator rights to complete some operations, such as installing software, modifying system settings, etc. The following summarizes some methods for obtaining Win11 administrator rights, I hope it can help you. 1. Use shortcut keys. In Windows 11 system, you can quickly open the command prompt through shortcut keys.
Quickly master: How to open two WeChat accounts on Huawei mobile phones revealed!
Mar 23, 2024 am 10:42 AM
In today's society, mobile phones have become an indispensable part of our lives. As an important tool for our daily communication, work, and life, WeChat is often used. However, it may be necessary to separate two WeChat accounts when handling different transactions, which requires the mobile phone to support logging in to two WeChat accounts at the same time. As a well-known domestic brand, Huawei mobile phones are used by many people. So what is the method to open two WeChat accounts on Huawei mobile phones? Let’s reveal the secret of this method. First of all, you need to use two WeChat accounts at the same time on your Huawei mobile phone. The easiest way is to
The secret of hatching mobile dragon eggs is revealed (step by step to teach you how to successfully hatch mobile dragon eggs)
May 04, 2024 pm 06:01 PM
Mobile games have become an integral part of people's lives with the development of technology. It has attracted the attention of many players with its cute dragon egg image and interesting hatching process, and one of the games that has attracted much attention is the mobile version of Dragon Egg. To help players better cultivate and grow their own dragons in the game, this article will introduce to you how to hatch dragon eggs in the mobile version. 1. Choose the appropriate type of dragon egg. Players need to carefully choose the type of dragon egg that they like and suit themselves, based on the different types of dragon egg attributes and abilities provided in the game. 2. Upgrade the level of the incubation machine. Players need to improve the level of the incubation machine by completing tasks and collecting props. The level of the incubation machine determines the hatching speed and hatching success rate. 3. Collect the resources required for hatching. Players need to be in the game
Detailed explanation of Oracle version query method
Mar 07, 2024 pm 09:21 PM
Detailed explanation of Oracle version query method Oracle is one of the most popular relational database management systems in the world. It provides rich functions and powerful performance and is widely used in enterprises. In the process of database management and development, it is very important to understand the version of the Oracle database. This article will introduce in detail how to query the version information of the Oracle database and give specific code examples. Query the database version of the SQL statement in the Oracle database by executing a simple SQL statement
