In this post, we will see how we can register a component globally in Vue 2 and Vue 3.

In Vue, we can register a component in two ways: Locally and Globally

Global components are one that can be used anywhere in the application, whereas a local component cannot be used anywhere, it can only be used in those components where it is registered using components property in Vue

Let's register a Global component in both Vue 2 and Vue 3.

Register a Global component in Vue 3

In Vue 3, to register a component globally we will use the app.component() method.

Let's say we have component <GlobalComponent /> which we need in almost every component in our application.

So to register it globally, we will open main.js file and use the app.component() method.

import { createApp } from 'vue';
import GlobalComponent from './GlobalComponent.vue';

const app = createApp({})

app.component('GlobalComponent', GlobalComponent);

Once the component is globally registered in Vue 3 , we can use the template anywhere without importing it a second time in our components.

Register a Global component in Vue 2

In Vue 2, to register a component globally we will use the Vue.component() method.

We have to open the main.js file and import the component using Vue.component() method.

import Vue from 'vue';
import GlobalComponent from './GlobalComponent.vue';

Vue.component('GlobalComponent', GlobalComponent);

Now in Vue 2 too, you can just use the template in any other component without importing it again.

Note: Register a component globally, only when it is used almost everywhere in your application.

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