Using Vue to show and hide Toggle

Li gulare 2020-11-12 23:49:46
using vue hide toggle

Background introduction

jQuery There was a toggle() Method , You can toggle the display status of an element , In use vue If not introduced jQuery How to achieve this effect ?

Use scenarios

There are three common scenarios :

1. One of the control pages dom Elements

2. Multiple control pages dom Elements

3. In the control page dom Element is returned from the server , And there are many

Technical analysis

1. It can be used to achieve this effect in 12 scenes v-if Instructions , By setting true or false To control dom Hide and show of . If you control one dom Or more dom We can do it in data The corresponding flag, Every time a click event occurs flag=!flag , To switch flag Value . Click here dom Show or hide toggle that can be done .

2. The first and second scenarios are relatively simple and can be implemented in the above way , The third scenario doesn't work in this way , Because we don't know how many will return from the server dom, So we can't define control specifically dom Of flag Variable . In this case, how to render the data returned from the server by clicking dom, To achieve hide and show effect ?

Implementation method

The third scenario can be implemented with Vue.set() Method . The specific implementation is as follows :

1. The first step is to define a data Object to receive data returned from the server

return {

2. Define first toggleShow() Method :

methods: {
let obj = this.listAll[index]; // Find the clicked dom object
obj.hide = !obj.hide; // Add to this object hide attribute
this.$set(this.listAll, index, obj); // Finish adding hide New object for property set() Into the data In the data

3. Call in label template toggleShow() Method

<div v-for="(item, index) in listAll" :key="index">
<card @click.native="toggleShow(index)">
<div v-if="item.hide ? true:false">
// Show or hide area

Sum up

There are two ways to do this

1. stay data Fixed defined in flag value , Switch according to use flag Value to achieve switching dom Show or hide

2. Use Vue.set() Method , Add temporary to the data of asynchronous request meeting hide attribute , To control the clicked dom Element hide or show

If you don't know how to render the data received from the server in real time , You can look through this article :

vue How to render the data of asynchronous request to the page in real time ?

I'm Li gulare , Four years java Development , Four years of front end products , I'm a front-end architect for today's headlines , Lifelong learner . It is said that he loves development , The buddy who loves sharing is concerned about the official account of WeChat 『 Liguulare 』




本文为[Li gulare]所创,转载请带上原文链接,感谢

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