转载自：https://www.jb51.net/article/124287.htm
路由嵌套最重要的是在父路由(hello.vue)加上这段代码来.index.js文件
index.js:
import Vue from 'vue'
import Router from 'vue-router'
import Hello from '@/components/Hello'
import Foo from '@/components/Foo'
import Foo2 from '@/components/Foo2'
import Foo3 from '@/components/Foo3'
Vue.use(Router)
export default new Router({ //export default和export的区别是 前者只能导出一个 ，后者可以导出若干个
routes: [
{path: '/', redirect: '/hello'},
{
path: '/hello',
component: Hello,
children: [
{path: '/hello/foo', component: Foo},
{path: '/hello/foo2', component: Foo2},
{path: '/hello/foo3', component: Foo3}
]
},
{
path: '/cc',
name: 'Foo',
component: Foo
}
]
})
hello.vue:
<div>
<router-link to="/hello/foo">/hello/foo</router-link>
<router-link to="/hello/foo2">/hello/foo2</router-link>
<router-link to="/hello/foo3">/hello/foo3</router-link>
</div>
<router-view style="border: solid 1px blue"></router-view>
首先介绍一下动态路由。
动态路由按照我的理解，就是说能够进行页面的跳转，比如说：下面的这个页面中：
`<``template``>`
`<``div` `id``=``"app"``>`
`<``header``>`
`<``router-link` `to``=``"/"``>/</``router-link``>`
`<``router-link` `to``=``"/hello"``>/hello</``router-link``>`
`<``router-link` `to``=``"/cc"``>/cc</``router-link``>`
`</``header``>`
`<``router-view` `style``=``"border: 1px solid red"``></``router-view``>`
`</``div``>`
`</``template``>`
|
如果点击了/hello，那么在router-view中就会加载对应的模块，也就是在路由中设置的模块。
`import Vue from` `'vue'`
`import Router from` `'vue-router'`
`import Hello from` `'@/components/Hello'`
`import Foo from` `'@/components/Foo'`
`import Foo2 from` `'@/components/Foo2'`
`import Foo3 from` `'@/components/Foo3'`
`Vue.use(Router)`
`export` `default` `new` `Router({`
`routes: [`
`{path:` `'/'``, redirect:` `'/hello'``},`
`{`
`path:` `'/hello'``,`
`component: Hello,`
`children: [`
`{path:` `'/hello/foo'``, component: Foo},`
`{path:` `'/hello/foo2'``, component: Foo2},`
`{path:` `'/hello/foo3'``, component: Foo3}`
`]`
`},`
`{`
`path:` `'/cc'``,`
`name:` `'Foo'``,`
`component: Foo`
`}`
`]`
`})`
也就是说，会跳转到Hello和Foo这两个组件。
那么嵌套路由是什么意思呢，最开始我以为的是这样：/hello/foo 和/hello/foo2这两个路由可以简写成嵌套路由，其实不是的。嵌套路由只的是，在子组件中再次嵌套组件。然后在使用路由进行跳转，这样跳转的时候，变化的就只有子组件，而外边的父组件没有变化。
下面我把完整的例子放出来，看一下：
App.vue
`<``template``>`
`<``div` `id``=``"app"``>`
`<``header``>`
`<``router-link` `to``=``"/"``>/</``router-link``>`
`<``router-link` `to``=``"/hello"``>/hello</``router-link``>`
`<``router-link` `to``=``"/cc"``>/cc</``router-link``>`
`</``header``>`
`<``router-view` `style``=``"border: 1px solid red"``></``router-view``>`
`</``div``>`
`</``template``>`
`<``script``>`
`export default {`
`name: 'app'`
`}`
`</``script``>`
`<``style``>`
`#app {`
`font-family: 'Avenir', Helvetica, Arial, sans-serif;`
`-webkit-font-smoothing: antialiased;`
`-moz-osx-font-smoothing: grayscale;`
`text-align: center;`
`color: #2c3e50;`
`margin-top: 60px;`
`}`
`</``style``>`
Foo.vue
`<``template``>`
`<``div``>`
`<``h1``>3434234343</``h1``>`
`</``div``>`
`</``template``>`
`<``script``>`
`export default {`
`name: 'Foo',`
`data () {`
`return {`
`}`
`}`
`}`
`</``script``>`
`<!-- Add "scoped" attribute to limit CSS to this component only -->`
`<``style` `scoped>`
`h1, h2 {`
`font-weight: normal;`
`}`
`ul {`
`list-style-type: none;`
`padding: 0;`
`}`
`li {`
`display: inline-block;`
`margin: 0 10px;`
`}`
`a {`
`color: #42b983;`
`}`
`</``style``>`
Foo2.vue
`<``template``>`
`<``div``>`
`<``h1``>this is Foo2</``h1``>`
`</``div``>`
`</``template``>`
`<``script``>`
`export default {`
`name: 'Foo2',`
`data () {`
`return {`
`}`
`}`
`}`
`</``script``>`
`<!-- Add "scoped" attribute to limit CSS to this component only -->`
`<``style` `scoped>`
`h1, h2 {`
`font-weight: normal;`
`}`
`ul {`
`list-style-type: none;`
`padding: 0;`
`}`
`li {`
`display: inline-block;`
`margin: 0 10px;`
`}`
`a {`
`color: #42b983;`
`}`
`</``style``>`
Foo3.vue
`<``template``>`
`<``div``>`
`<``h1``>this is foo3</``h1``>`
`</``div``>`
`</``template``>`
`<``script``>`
`export default {`
`name: 'Foo3',`
`data () {`
`return {`
`}`
`}`
`}`
`</``script``>`
`<!-- Add "scoped" attribute to limit CSS to this component only -->`
`<``style` `scoped>`
`h1, h2 {`
`font-weight: normal;`
`}`
`ul {`
`list-style-type: none;`
`padding: 0;`
`}`
`li {`
`display: inline-block;`
`margin: 0 10px;`
`}`
`a {`
`color: #42b983;`
`}`
`</``style``>`
Hello.vue
`<``template``>`
`<``div` `class``=``"hello"``>`
`<``h1``>{{ msg }}</``h1``>`
`<``h2``>Essential Links</``h2``>`
`<``ul``>`
`<``li``><``a` `href``=``"[https://vuejs.org](https://vuejs.org/)"` `rel``=``"external nofollow"` `target``=``"_blank"``>Core Docs</``a``></``li``>`
`<``li``><``a` `href``=``"[https://forum.vuejs.org](https://forum.vuejs.org/)"` `rel``=``"external nofollow"` `target``=``"_blank"``>Forum</``a``></``li``>`
`<``li``><``a` `href``=``"[https://gitter.im/vuejs/vue](https://gitter.im/vuejs/vue)"` `rel``=``"external nofollow"` `target``=``"_blank"``>Gitter Chat</``a``></``li``>`
`<``li``><``a` `href``=``"[https://twitter.com/vuejs](https://twitter.com/vuejs)"` `rel``=``"external nofollow"` `target``=``"_blank"``>Twitter</``a``></``li``>`
`<``br``>`
`<``li``><``a` `href``=``"[http://vuejs-templates.github.io/webpack/](http://vuejs-templates.github.io/webpack/)"` `rel``=``"external nofollow"` `target``=``"_blank"``>Docs for This Template</``a``></``li``>`
`</``ul``>`
`<``h2``>Ecosystem</``h2``>`
`<``ul``>`
`<``li``><``a` `href``=``"[http://router.vuejs.org/](http://router.vuejs.org/)"` `rel``=``"external nofollow"` `target``=``"_blank"``>vue-router</``a``></``li``>`
`<``li``><``a` `href``=``"[http://vuex.vuejs.org/](http://vuex.vuejs.org/)"` `rel``=``"external nofollow"` `target``=``"_blank"``>vuex</``a``></``li``>`
`<``li``><``a` `href``=``"[http://vue-loader.vuejs.org/](http://vue-loader.vuejs.org/)"` `rel``=``"external nofollow"` `target``=``"_blank"``>vue-loader</``a``></``li``>`
`<``li``><``a` `href``=``"[https://github.com/vuejs/awesome-vue](https://github.com/vuejs/awesome-vue)"` `rel``=``"external nofollow"` `target``=``"_blank"``>awesome-vue</``a``></``li``>`
`</``ul``>`
`<``div``>`
`<``router-link` `to``=``"/hello/foo"``>/hello/foo</``router-link``>`
`<``router-link` `to``=``"/hello/foo2"``>/hello/foo2</``router-link``>`
`<``router-link` `to``=``"/hello/foo3"``>/hello/foo3</``router-link``>`
`</``div``>`
`<``router-view` `style``=``"border: solid 1px blue"``></``router-view``>`
`</``div``>`
`</``template``>`
`<``script``>`
`export default {`
`name: 'hello',`
`data () {`
`return {`
`msg: 'Welcome to Your Vue.js App'`
`}`
`}`
`}`
`</``script``>`
`<!-- Add "scoped" attribute to limit CSS to this component only -->`
`<``style` `scoped>`
`h1, h2 {`
`font-weight: normal;`
`}`
`ul {`
`list-style-type: none;`
`padding: 0;`
`}`
`li {`
`display: inline-block;`
`margin: 0 10px;`
`}`
`a {`
`color: #42b983;`
`}`
`</``style``>`
|
路由：
`import Vue from` `'vue'`
`import Router from` `'vue-router'`
`import Hello from` `'@/components/Hello'`
`import Foo from` `'@/components/Foo'`
`import Foo2 from` `'@/components/Foo2'`
`import Foo3 from` `'@/components/Foo3'`
`Vue.use(Router)`
`export` `default` `new` `Router({`
`routes: [`
`{path:` `'/'``, redirect:` `'/hello'``},`
`{`
`path:` `'/hello'``,`
`component: Hello,`
`children: [`
`{path:` `'/hello/foo'``, component: Foo},`
`{path:` `'/hello/foo2'``, component: Foo2},`
`{path:` `'/hello/foo3'``, component: Foo3}`
`]`
`},`
`{`
`path:` `'/cc'``,`
`name:` `'Foo'``,`
`component: Foo`
`}`
`]`
`})`
|
需要注意的是仔细的看App.vue和Hello.vue中，都包含<router-view></router-view>，但是他们的作用不同，App.vue是顶层路由，指的是组外层的路由，Hello.vue中的是嵌套路由，负责显示子组件。
我把页面截图一下：
[图片上传失败...(image-97f412-1534080161903)]
这个界面，点击最上边的 / 或者/hello 或者/cc的时候，发生变化的是红色路由中的内容。当点击/hello/foo /hello/foo2 /hello/foo3 的时候，发生变化的是下面蓝色路由中的内容。
这样就和我们平时应用十分的相似了。最外层于有变化，或者局部有变化，但是不想全局的发生改变。
同时，这样也符合了模块化，各个模块分别在不同的模块中。
