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VueJs Event Bus

Introduction


Event buses are a useful way of communicating between components which are not directly related, i.e. Have no parent-child relationship.
It is just an empty
vue
instance, which can be used to
$emit
events or listen
 $on
the said events.

Syntax


1. export default new Vue()

Remarks


Use vuex if your application has a lot of components requiring the data of each other.

Examples


eventBus


// setup an event bus, do it in a separate js file
var bus = new Vue()
// imagine a component where you require to pass on a data property
// or a computed property or a method!
Vue.component('card', {
 template: `<div class='card'>
 Name:
 <div class='margin-5'>
 <input v-model='name'>
 </div>
 <div class='margin-5'>
 <button @click='submit'>Save</button>
 </div>
 </div>`,
 data() {
 return {
 name: null
 }
 },
 methods: {
 submit() {
 bus.$emit('name-set', this.name)
 }
 }
})
// In another component that requires the emitted data.
var data = {
 message: 'Hello Vue.js!'
}
var demo = new Vue({
 el: '#demo',
 data: data,
 created() {
 console.log(bus)
 bus.$on('name-set', (name) => {
 this.message = name
 })
 }
})



Conclusion

In this page (written and validated by ) you learned about VueJs Event Bus . What's Next? If you are interested in completing VueJs tutorial, your next topic will be learning about: VueJs Events.



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