sending properties to dynamically loaded components

Question

sending properties to dynamically loaded components

I'm struggling with transferring props between children and parent components using Vue Routes. Within my Layout component, I have a wrapper DIV structured like this:

<template>
    <div class="container" v-bind:class="cssClass">
      <router-view></router-view>
    </div>
</template>

<script>
export default {
  name: 'Layout',
  props: ['cssClass']
}
</script>

In my base App JS file, I have defined my routes as shown below. Initially, the view loads with the class "container-animated" and everything works perfectly.

const router = new VueRouter({
    routes: [
      { path: '/', component: Layout, props: { cssClass: 'container-animated' },
        children: [
          { path: '', component: Homepage },
          { path: '/hello-world', component: HelloWorldPage, props: { cssClass: '' } }
        ]
     },
    ]
});

However, when navigating to the /hello-world route, I want to pass an empty cssClass prop down to Layout (where HelloWorldPage is nested). How can I achieve this? Is using props the right approach?

javascript vue.js vuejs2 vue-router

Answer 1

Answer №1

After some experimentation, I have managed to come up with a solution for my current issue.

I discovered that child props are not automatically received by the parent component when passed through the Vue Router. To work around this, I implemented a custom event handling mechanism where each dynamically injected component emits a 'childinit' event back to the parent Layout component. The emitted value is stored in a local variable within the parent, which is then used to bind the appropriate class to the element.

const router = new VueRouter({
    routes: [
      {
        path: '/',
        component: Layout,
        children: [
          {
            path: '',
            component: Homepage,
            props: { cssClass: 'home' },
          },
          {
              path: '/helloworld',
              component: HelloWorldPage,
              props: { cssClass: 'helloworld' }
          }
        ]
      }
    ]
});

The Layout component implementation:

<template>
    <div class="container" v-bind:class="className">
      <router-view v-on:childinit="onChildInit"></router-view>
    </div>
</template>

<script>
export default {
  name: 'Layout',
  props: ['cssClass'],
  data() {
    return {
      className : ''
    }
  },
  methods: {
    onChildInit( value ){
      this.className = value;
    }
  }
}
</script>

The Homepage component logic:

export default {
  name: 'Homepage',
  props: ['cssClass'],
  created() {
    this.$emit('childinit', this.cssClass);
  }
}

In a similar fashion, the HelloWorld component also emits the 'childinit' event. It might be worth exploring creating a base component that handles this initialization event to avoid repetition in both components.

Answer 2

After some experimentation, I have managed to come up with a solution for my current issue.

I discovered that child props are not automatically received by the parent component when passed through the Vue Router. To work around this, I implemented a custom event handling mechanism where each dynamically injected component emits a 'childinit' event back to the parent Layout component. The emitted value is stored in a local variable within the parent, which is then used to bind the appropriate class to the element.

const router = new VueRouter({
    routes: [
      {
        path: '/',
        component: Layout,
        children: [
          {
            path: '',
            component: Homepage,
            props: { cssClass: 'home' },
          },
          {
              path: '/helloworld',
              component: HelloWorldPage,
              props: { cssClass: 'helloworld' }
          }
        ]
      }
    ]
});

The Layout component implementation:

<template>
    <div class="container" v-bind:class="className">
      <router-view v-on:childinit="onChildInit"></router-view>
    </div>
</template>

<script>
export default {
  name: 'Layout',
  props: ['cssClass'],
  data() {
    return {
      className : ''
    }
  },
  methods: {
    onChildInit( value ){
      this.className = value;
    }
  }
}
</script>

The Homepage component logic:

export default {
  name: 'Homepage',
  props: ['cssClass'],
  created() {
    this.$emit('childinit', this.cssClass);
  }
}

In a similar fashion, the HelloWorld component also emits the 'childinit' event. It might be worth exploring creating a base component that handles this initialization event to avoid repetition in both components.

Answer 3

Answer №2

Although this may be considered old, there is no need to stress about creating a method in the component that emits your value. Here's my approach:

Here is an example of your layout:

<template>
<div class="container" v-bind:class="className">
    <router-view></router-view>
</div>
</template>
<script>
export default {
  name: 'Layout',
  props: ['cssClass'],
  data() {
    return {
      className : ''
    }
  },
  // set class initially
  created () {
    this.setClassName(this.$route)
  },
  // and when route changes
  watch: {
    $route: function (val) {
        this.setClassName(val)
    }
  },
  methods: {
    setClassName( Route ){
      // each matched route is checked for cssClass from top to bottom, so you can override
      Route.matched.forEach((route) => {
        if (route.props.default && route.props.default instanceof Object && 'cssClass' in route.props.default) {
          this.className = route.props.default.cssClass
        }
      })
    }

  }
}
</script>

This method keeps everything within the Layout component. It may not be the perfect solution, but another option could be using router.afterEach() and setting the value to Vuex store.

Answer 4

Although this may be considered old, there is no need to stress about creating a method in the component that emits your value. Here's my approach:

Here is an example of your layout:

<template>
<div class="container" v-bind:class="className">
    <router-view></router-view>
</div>
</template>
<script>
export default {
  name: 'Layout',
  props: ['cssClass'],
  data() {
    return {
      className : ''
    }
  },
  // set class initially
  created () {
    this.setClassName(this.$route)
  },
  // and when route changes
  watch: {
    $route: function (val) {
        this.setClassName(val)
    }
  },
  methods: {
    setClassName( Route ){
      // each matched route is checked for cssClass from top to bottom, so you can override
      Route.matched.forEach((route) => {
        if (route.props.default && route.props.default instanceof Object && 'cssClass' in route.props.default) {
          this.className = route.props.default.cssClass
        }
      })
    }

  }
}
</script>

This method keeps everything within the Layout component. It may not be the perfect solution, but another option could be using router.afterEach() and setting the value to Vuex store.

Answer 5

Answer №3

If you're looking for an alternative approach, consider this method:

Routing with Vue:

const router = new VueRouter({
    routes: [
      {
        path: '/',
        component: Layout,
        children: [
          {
            path: '',
            component: Homepage,
            meta: { cssClass: 'home' },
          },
          {
            path: '/helloworld',
            component: HelloWorldPage,
            meta: { cssClass: 'helloworld' }
          }
        ]
      }
    ]
});

Creating a layout component:

<template>
    <div class="container" :class="className">
       <router-view ></router-view>
    </div>
</template>

<script>
export default {
  name: 'Layout',
  data() {
    return {
      className : ''
    }
  },
  created() {
    this.className = this.$route.meta.cssClass;
  }
}
</script>

For a setup with reactivity:

Using setup and router in the layout component:

<template>
    <div class="container" :class="cssClass">
       <router-view ></router-view>
    </div>
</template>

<script setup>
   import { useRoute } from 'vue-router'
   const route = useRoute();
   const { cssClass } = route.meta;
</script>

<script>
export default {
  name: 'Layout',
}
</script>

This updated method is designed for Vue 3 and offers a more efficient and streamlined solution.

Answer 6

If you're looking for an alternative approach, consider this method:

Routing with Vue:

const router = new VueRouter({
    routes: [
      {
        path: '/',
        component: Layout,
        children: [
          {
            path: '',
            component: Homepage,
            meta: { cssClass: 'home' },
          },
          {
            path: '/helloworld',
            component: HelloWorldPage,
            meta: { cssClass: 'helloworld' }
          }
        ]
      }
    ]
});

Creating a layout component:

<template>
    <div class="container" :class="className">
       <router-view ></router-view>
    </div>
</template>

<script>
export default {
  name: 'Layout',
  data() {
    return {
      className : ''
    }
  },
  created() {
    this.className = this.$route.meta.cssClass;
  }
}
</script>

For a setup with reactivity:

Using setup and router in the layout component:

<template>
    <div class="container" :class="cssClass">
       <router-view ></router-view>
    </div>
</template>

<script setup>
   import { useRoute } from 'vue-router'
   const route = useRoute();
   const { cssClass } = route.meta;
</script>

<script>
export default {
  name: 'Layout',
}
</script>

This updated method is designed for Vue 3 and offers a more efficient and streamlined solution.

Answer 7

Answer №4

Allow me to illustrate how vue functions:

You start with your main component, which is Layout.vue

<template>
  <div id="app" class="container-fluid">
    <router-view/>
  </div>
</template>

<style>
 .container-fluid {
background-color:blue; //specified in the parent, this class will be inherited by all elements within #app
}
</style>

Next, your vue router setup should resemble something like this:

{
    path: '/',
    name: 'Layout',
    component: Layout,
    children: [
        { path: '', component: Create, name: 'Create' },
    ]
}

By specifying that everything inside Layout.vue inherits from .container-fluid, the Create component will also inherit styles defined in its parent (Layout)

I trust this explanation clarifies things for you.

Best regards,

Answer 8

Allow me to illustrate how vue functions:

You start with your main component, which is Layout.vue

<template>
  <div id="app" class="container-fluid">
    <router-view/>
  </div>
</template>

<style>
 .container-fluid {
background-color:blue; //specified in the parent, this class will be inherited by all elements within #app
}
</style>

Next, your vue router setup should resemble something like this:

{
    path: '/',
    name: 'Layout',
    component: Layout,
    children: [
        { path: '', component: Create, name: 'Create' },
    ]
}

By specifying that everything inside Layout.vue inherits from .container-fluid, the Create component will also inherit styles defined in its parent (Layout)

I trust this explanation clarifies things for you.

Best regards,

sending properties to dynamically loaded components

Answer №1

Answer №2

Answer №3

Answer №4

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