如何将应用程序数据传递给 VueRouter 组件

Question

我正在使用 VueRouter 根据 URL 加载模板。当我尝试在组件中使用 app.data 中定义的属性时，我收到 [VueWarn] Property or method "role" is not defined.

如何将每个数据属性传递给子组件？

这是我的脚本：

const Home = { template: '<p>home page, {{role}}</p>' }
const NotFound = { template: '<p>Page not found</p>' }

const routes = [
    {path: '/', component: Home}
    {path: '*', component: NotFound}
]

Vue.use(VueRouter)
var app = new Vue({
    el: '#app',
    data: {
        role: 0,
        cookiesAlert: true
    },
    router: new VueRouter({routes})
})

Answer 1

我认为您的路由器构建选项设置不正确。通常，我更喜欢使用'named routes'，因此我将设置为：

const router = new VueRouter({
   routes: [
        { name: 'role', path: '/:role', component: User },
        { path: '*', component: Home }
   ]
})

如果我没有理解错你的问题，你想做的是通过url将父组件中的'data'传递给子组件并读取子组件中的数据？

const User = {
  template: '<div><br/>Role read from url is {{ $route.params.role }}</div>'
}

const Home = {
  template: '<div><br/>Welcome</div>'
}

const router = new VueRouter({
  routes: [
    { name: 'role', path: '/:role', component: User },
    { path: '*', component: Home }
  ]
})


new Vue({
  router,
  el: '#app',
  data: {
       role: 'default role'
  }
})

<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.17/vue.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/vue-router/3.0.2/vue-router.min.js"></script>


<div id="app">

  
  The role is (Please change the 'role' value and click on '/User' link): <input v-model="role" type="text" /> <br/>
  
  <router-link :to="{ name: 'role', params: { role: role  }}">User</router-link>
   
 
  <router-link to="/">Home</router-link>
  
  <router-view></router-view>
  
</div>

或者如果您不想使用 $route.params.role，我要做的是将路由器配置选项中的 'props' 设置为 true。

When props is set to true, the route.params will be set as the component props.

const router = new VueRouter({
   routes: [
      { name: 'role', path: '/:role', component: User, props: true },
      { path: '*', component: Home }
   ]
})

并绑定到 'props' 内部子组件。

const User = {
   props: ['role'],
   template: '<div><br/>Role read from url is {{ role }}</div>'
}

如何将应用程序数据传递给 VueRouter 组件

How to pass app data to a VueRouter component

javascript

vue.js

vue-router