How to Create Shareable Stateful Services in Vue

How to Create Shareable Stateful Services in Vue

Learn how to create shareable stateful services in Vue. There are multiple ways to manage state in Vue applications. Explores how stateful data and asynchronous operations can be done outside of components without using Vuex.

Vuex is not always the best option to create shareable stateful logic in Vue applications, as only global state should be there. This article covers some alternatives.

There are multiple ways to manage state in Vue applications. This article explores how stateful data and asynchronous operations can be done outside of components without using Vuex.

Event Bus

Event bus is a pattern that uses an empty Vue instance to communicate between components.

// eventBus.js
import Vue from 'vue'

export const bus = new Vue()

// component_one.vue
import { bus } from './eventBus.js'

export default {
    data() {
        return {
            value: null
        }
    }
    method
    created() {
        // Listens for the 'action' event
        bus.$on('action', ({ payload }) => {
            this.value = payload
        })
    }
}

// component_two.vue
import {bus} from './eventBus.js'

export default {
    created() {
        // Emits the 'action' event
        bus.$emit('action', {
            myPayload: 1234
        })
    }
}

Event bus pattern is simple and easy to use, but it does not scale well, especially in medium to large applications with a lot of data flow. Therefore, this pattern could only really be applied in smaller applications. However, I still would not recommend it, as there are better options. What’s more, event bus is deprecated in Vue 3, so if you want to upgrade from Vue 2 faster and easier, forget about the event bus.

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