Vue provides globalProperties on the app instance, an object that can be used to register global properties that can be accessed on any component instance inside the application.
This is a replacement of Vue 2's
Vue.prototype which is no longer present in Vue 3.main.js
import { createApp } from 'vue'
const app = createApp({
/* root component options */
})
app.config.globalProperties.msg = 'hello'
msg can be accessed on any component instance inside the application:
MyComponent.vue
<script>
export default {
mounted() {
console.log(this.msg) // 'hello'
},
}
</script>
As with anything global, this should be used sparingly. If your app state is too complex, it's better to use Pinia.
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