midVue.js
Explain 'Plugin' development in Vue 3.
Updated May 4, 2026
Short answer
A plugin is an object with an install method or a function that adds global-level functionality to a Vue app.
Deep explanation
Plugins are used to add global components, directives, or provide/inject values app-wide. They receive the app instance as the first argument, allowing you to call app.component(), app.config.globalProperties, etc.
Real-world example
Integrating an i18n library or a global UI component library into an application.
Common mistakes
- Polluting `globalProperties` with too many variables, which can lead to naming collisions.
Follow-up questions
- How do you use a plugin?