Emitting events to multiple components in VueJS with different parent components

Question

Emitting events to multiple components in VueJS with different parent components

I have multiple Vue Components set up like this:

App.js
 |
 |-- CreateTasks
 |
 |-- LatestTasks (displays 20 tasks)
 |
 |-- FooBar
 |   |---LatestTasks (displays 10 tasks)

My goal is to trigger an event from the CreateTasks component when a new task is created, and have all instances of the LatestTasks component update their task list accordingly.

Despite my efforts, I'm having trouble getting this functionality to work properly.

Below is how I've implemented it:

In CreateTasks Component

  methods: {
    createTask(){
      let task = { name: 'newTask' };
      this.$emit( 'new-task-created' );
    }
  }

In LatestTasks Component

  methods: {
    getLatestTasks(){
      // logic to fetch latest tasks
    }
  }
  created() {
    window.addEventListener('new-task-created', this.getLatestTasks );
  },

javascript vue.js

Answer 1

Answer №1

If you're looking for a more structured approach, consider using Vuex or Redux. However, if you're working on a small project and just need a quick solution using events:

Start by attaching events to the root element:

this.$root.$on('myevent',function(data){console.log(data)})

Then, emit the events from the root element:

this.$root.$emit('myevent',{data:1234}}

Another option is to create an EventBus:

// eventbus.js
import Vue from 'vue'
const EventBus = new Vue()
export default EventBus

Subscribe to the EventBus in your component:

// component1.js
import Vue from 'vue'
import EventBus from './eventbus'
Vue.component('component1', {
  mounted () {
    EventBus.$on('myevent', function (data) {
       console.log(data)
    });
  }
});

Emit an event through the EventBus:

// component2.js
import Vue from 'vue'
import EventBus from './eventbus'
Vue.component('component2', {
  methods: {
    emitMethod () {
       EventBus.$emit('myevent', {data: 1234});
    }
  }
});

Answer 2

If you're looking for a more structured approach, consider using Vuex or Redux. However, if you're working on a small project and just need a quick solution using events:

Start by attaching events to the root element:

this.$root.$on('myevent',function(data){console.log(data)})

Then, emit the events from the root element:

this.$root.$emit('myevent',{data:1234}}

Another option is to create an EventBus:

// eventbus.js
import Vue from 'vue'
const EventBus = new Vue()
export default EventBus

Subscribe to the EventBus in your component:

// component1.js
import Vue from 'vue'
import EventBus from './eventbus'
Vue.component('component1', {
  mounted () {
    EventBus.$on('myevent', function (data) {
       console.log(data)
    });
  }
});

Emit an event through the EventBus:

// component2.js
import Vue from 'vue'
import EventBus from './eventbus'
Vue.component('component2', {
  methods: {
    emitMethod () {
       EventBus.$emit('myevent', {data: 1234});
    }
  }
});

Answer 3

Answer №2

If you're looking for the best way to manage state in your Vue application, consider using Vuex. Instead of emitting events within a method like createTask(), you can utilize the dispatch() method to trigger an action in the Vuex store. Then, in any component that needs access to this data, simply create a computed property that connects to the appropriate Vuex getter.

For more information on how to use Vuex, check out the Vuex Docs.

Alternatively, you could still emit an event as originally suggested, but you would need to listen for it in the parent component, store it in a local variable, and then pass it down to child components through props. This approach may require more setup, but can be effective depending on your specific needs.

I hope this explanation helps. If you'd like, I can provide a more detailed example to assist with implementing these concepts in your project.

Answer 4

If you're looking for the best way to manage state in your Vue application, consider using Vuex. Instead of emitting events within a method like createTask(), you can utilize the dispatch() method to trigger an action in the Vuex store. Then, in any component that needs access to this data, simply create a computed property that connects to the appropriate Vuex getter.

For more information on how to use Vuex, check out the Vuex Docs.

Alternatively, you could still emit an event as originally suggested, but you would need to listen for it in the parent component, store it in a local variable, and then pass it down to child components through props. This approach may require more setup, but can be effective depending on your specific needs.

I hope this explanation helps. If you'd like, I can provide a more detailed example to assist with implementing these concepts in your project.

Emitting events to multiple components in VueJS with different parent components

Answer №1

Answer №2

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