Analysis on the use of vue routing

This article mainly introduces the usage analysis of vue routing, which has certain reference value. Now I share it with everyone. Friends in need can refer to it

vue-router is the official routing of Vue.js Plug-in, which is deeply integrated with vue.js and suitable for building single-page applications.

vue-router is the official routing plug-in of Vue.js. It is deeply integrated with vue.js and is suitable for building single-page applications. Vue's single-page application is based on routing and components. Routing is used to set access paths and map paths and components. Traditional page applications use some hyperlinks to achieve page switching and jumps. In the vue-router single-page application, it is switching between paths, that is, switching of components.

This article will introduce various features of vue-router in the form of examples. It contains 6 examples in total. Each example has a beggar version, and the first 5 examples have an emperor version.
The beggar version is an HTML page with all the code mixed together, and the emperor version is built based on the vue-webpack-simple template.

The first single-page application (01)

Now we start the vue-router journey with a simple single-page application. This single-page application has two Paths: /home and /about. Corresponding to these two paths are the two components Home and About.

#1. Create components

First introduce vue.js and vue-router.js:

<script src="js/vue.js"></script>
<script src="js/vue-router.js"></script>

然后创建两个组件构造器Home和About：
var Home = Vue.extend({
 template: &#39;<p><h1>Home</h1><p>{{msg}}</p></p>&#39;,
 data: function() {
 return {
  msg: &#39;Hello, vue router!&#39;
 }
 }
})

var About = Vue.extend({
 template: &#39;<p><h1>About</h1><p>This is the tutorial about vue-router.</p></p>&#39;
})

2. Create Router

var router = new VueRouter()

Call the constructor VueRouter to create a router instance router.

3. Mapping routes

router.map({
 '/home': { component: Home },
 '/about': { component: About }
})

Call the map method of router to map routes. Each route exists in the form of key-value, where key is the path and value is the component.

For example: '/home' is the key of a route, which represents the path; {component: Home} represents the component mapped by the route.

4. Use the v-link instruction

<p class="list-group">
 <a class="list-group-item" v-link="{ path: &#39;/home&#39;}">Home</a>
 <a class="list-group-item" v-link="{ path: &#39;/about&#39;}">About</a>
</p>

Use the v-link instruction on the a element to jump to the specified path.

5. Use the tag

<router-view></router-view>

Use the <router-view></router-view> tag on the page, which uses for rendering matching components.

6. Start routing

var App = Vue.extend({})
router.start(App, '#app')

The operation of the router requires a root component. router.start(App, '#app') means that the router will create an App instance. And mounted to the #app element.

Note: Applications using vue-router do not need to explicitly create a Vue instance. Instead, call the start method to mount the root component to an element.

After you obtain the latest source code from GitHub, if you want to run the Emperor Edition, take demo01 as an example and execute the following command under Git Bash:

npm run demo01-dev

Then visit the address http://127.0.0.1:8080

in the browser. If you want to compile and publish, please execute the following command under Git Bash:

npm run demo01-build

Steps to write a single page

The above 6 steps can be said to be the basic steps for creating a single page application:

JavaScript

1. Create components: Create components that need to be rendered by single-page applications

2. Create routes: Create a VueRouter instance

3. Map routing: call the map method of the VueRouter instance

4. Start routing: call the start method of the VueRouter instance

HTML

router.redirect({
 '/': '/home'
})

var Home = Vue.extend({
 template: '#home',
 data: function() {
 return {
  msg: 'Hello, vue router!'
 }
 }
})

var News = Vue.extend({
 template: '#news'
})

var Message = Vue.extend({
 template: '#message'
})

router.map({
 '/home': {
 component: Home,
 // 定义子路由
 subRoutes: {
  '/news': {
  component: News
  },
  '/message': {
  component: Message
  }
 }
 },
 '/about': {
 component: About
 }
})

<template id="newsDetail">
 <p>
 News Detail - {{$route.params.id}} ......
 </p>
</template>

var NewsDetail = Vue.extend({
 template: '#newsDetail'
})

router.map({
 '/home': {
 component: Home,
 subRoutes: {
  '/news': {
  name: 'news',
  component: News,
  subRoutes: {
   'detail/:id': {
   name: 'detail',
   component: NewsDetail
   }
  }
  },
  '/message': {
  component: Message
  }
 }
 },
 '/about': {
 component: About
 }
})

<!-- 字面量路径 -->
<a v-link="&#39;home&#39;">Home</a>

<!-- 效果同上 -->
<a v-link="{ path: &#39;home&#39; }">Home</a>

<!-- 具名路径 -->
<a v-link="{ name: &#39;detail&#39;, params: {id: &#39;01&#39;} }">Home</a>

<p>
 <p>当前路径：{{$route.path}}</p>
 <p>当前参数：{{$route.params | json}}</p>
 <p>路由名称：{{$route.name}}</p>
 <p>路由查询参数：{{$route.query | json}}</p>
 <p>路由匹配项：{{$route.matched | json}}</p>
</p>

<a class="list-group-item" v-link="{ path: &#39;/home&#39;, activeClass: &#39;active&#39;}">Home</a>
<a class="list-group-item" v-link="{ path: &#39;/about&#39;, activeClass: &#39;active&#39;}">About</a>

<ul class="nav nav-tabs">
 <li class="active">
 <a v-link="{ path: &#39;/home/news&#39;}">News</a>
 </li>
 <li>
 <a v-link="{ path: &#39;/home/message&#39;}">Messages</a>
 </li>
</ul>

<ul class="nav nav-tabs">
 <li :class="currentPath == &#39;/home/news&#39; ? &#39;active&#39;: &#39;&#39;">
 <a v-link="{ path: &#39;/home/news&#39;}">News</a>
 </li>
 <li :class="currentPath == &#39;/home/message&#39; ? &#39;active&#39;: &#39;&#39;">
 <a v-link="{ path: &#39;/home/message&#39;}">Messages</a>
 </li>
</ul>

var Home = Vue.extend({
 template: '#home',
 data: function() {
 return {
  msg: 'Hello, vue router!',
  currentPath: ''
 }
 },
 route: {
 data: function(transition){
  transition.next({
  currentPath: transition.to.path
  })
 }
 }
})

var well = new Vue({
 el: '.well',
 data: {
 msg: '',
 color: '#ff0000'
 },
 methods: {
 setColor: function(){
  this.color = '#' + parseInt(Math.random()*256).toString(16)
   + parseInt(Math.random()*256).toString(16)
   + parseInt(Math.random()*256).toString(16)
 },
 setColoredMessage: function(msg){
  this.msg += &#39;<p style="color: &#39; + this.color + &#39;">&#39; + msg + &#39;</p>&#39;
 },
 setTitle: function(title){
  this.msg = &#39;<h2 style="color: #333">&#39; + title + &#39;</h2>&#39;
 }
 }
})

<p class="well">
 {{{ msg }}}
</p>

function RouteHelper(name) {
 var route = {
 canReuse: function(transition) {
  well.setColoredMessage('执行组件' + name + '的钩子函数:canReuse')
  return true
 },
 canActivate: function(transition) {
  well.setColoredMessage('执行组件' + name + '的钩子函数:canActivate')
  transition.next()
 },
 activate: function(transition) {
  well.setColoredMessage('执行组件' + name + '的钩子函数:activate')
  transition.next()
 },
 canDeactivate: function(transition) {
  well.setColoredMessage('执行组件' + name + '的钩子函数:canDeactivate')
  transition.next()
 },
 deactivate: function(transition) {
  well.setColoredMessage('执行组件' + name + '的钩子函数:deactivate')
  transition.next()
 },
 data: function(transition) {
  well.setColoredMessage('执行组件' + name + '的钩子函数:data')
  transition.next()
 }
 }
 return route;
}

var Home = Vue.extend({
 template: '#home',
 data: function() {
 return {
  msg: 'Hello, vue router!',
  path: ''
 }
 },
 route: RouteHelper('Home')
})

var News = Vue.extend({
 template: '#news',
 route: RouteHelper('News')
})

var Message = Vue.extend({
 template: '#message',
 route: RouteHelper('Message')
})

var About = Vue.extend({
 template: '#about',
 route: RouteHelper('About')
})