Dynamic registration and dynamic loading of components in Vue

Herbal tea ice 2020-11-13 03:27:01
dynamic registration dynamic loading components


Catalog

Problem description

Application in the project

Use summary


Problem description

In actual projects , Different data presentation view components are developed for different data , for example : Topology 、 Heat map 、 Map . Each type of view has a separate .vue Components , On the interface management platform , In order to achieve dynamic new view components , At the same time, you can modify and select the type of view at will . And as the project expands , The base view components will also be added , namely : The number of base view components is not fixed .

This requires that in the interface operation configuration view , We can register and load components dynamically . About dynamic registration and loading components , There are many examples on the Internet , See reprinted the most is This blog post , Explained Vue Four ways of dynamic loading , Write very well , But at first I couldn't get into the actual project very well . Another common example is about tab Page of the switch , By using Vue Of compent Of :is Property to dynamically switch which component to use , About this program , There are a lot of blogs , for example This blog post , Very intuitive and clear . But in the relevant blog posts I found , Most of them need to put related components in advance import Come in , And then dynamically switch components , It can't register dynamically and switch dynamically .

This blog post It's very good , The problems he described are basically the same as those I encountered , Then he came up with three solutions , I tried it all separately , Finally, register local components to solve the problem . Let's take a look at the problems I actually encountered .

Application in the project

In development , There is one panel.vue Components , Used to maintain panel information , When modifying the panel , You can select the view type of the panel , This is the effect of a drop-down selection , After selecting a different data view , Render different components .

<component :is="zjName" :resData="zjResData"></component>

among :zjName It's a component ,zjResData It is the data information corresponding to the component . How to dynamically register and introduce components ?

zjName:function(){
var t_url = '';
if(!ctool.strIsEmpty(this.panelObj.res_data)){
t_url = this.panelObj.pt_url;
}else{
t_url = this.pt_url;
}
if(this.panelObj.type!=0 && !ctool.strIsEmpty(t_url)){
var myComponent =() => import(`./../../components/custom_panel/${t_url}.vue`);
//var myComponent = resolve => require.ensure([], () => resolve(require(`./../../components/custom_panel/${t_url}.vue`)));
//var myComponent =require(`./../../components/custom_panel/${t_url}.vue`).default;
//var app_url = {t_url : require(`./../../components/custom_panel/${t_url}.vue`).default};
return myComponent;
}
//Vue.component(t_url, res => require([`./../../components/custom_panel/${t_url}.vue`], res));
return t_url;
}

The above is a way to calculate attribute types , It is mainly used to return components dynamically , You can see that there are several ways to register .

Obviously , Directly through import perhaps require The resulting component can be directly given to is Attribute is enough . I've been wrestling with component names , So whatever you do , You can't render components correctly , Actually , Direct the component to is Attribute is enough , No component name is required .

Use summary

(1) When searching for related blogs , Many people, including myself, have met and said no template perhaps render Function error prompt , A lot of people are here vue2.0 After upgrading vue-loader Greater than 13.0 Problems with the version of , Use require When to add .default that will do , After verification , That's true , If vue-loader Version is 12.0.3, Use it directly require that will do , On time if the version is 14.2.4 Need default.

(2) If there is setInterval A timed task that is executed on time , So even after the component is destroyed , The custom task will continue , So you need to be in beforeDestory Hook function , Clear timer , This blog post refers to .

(3) vue Component in mounted Use in setTimeout() invalid , Use es6 The arrow function of can solve , for example :

mounted() {
// Without delay , take div Width is 20, There is a problem
setTimeout(()=>{
this.initAll();
},500);
},

 

版权声明
本文为[Herbal tea ice]所创,转载请带上原文链接,感谢

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