The onMounted lifecycle hook in Vue 3 Composition API is called after the component has been mounted to the DOM. As the creator of CoreUI with over 11 years of Vue.js development experience, I use onMounted for DOM manipulation, API calls, and third-party library initialization that requires the component to be fully rendered. This hook is the Composition API equivalent of the mounted lifecycle hook in Options API.

Setting up a new Vue 3 project efficiently is essential for modern web development with improved performance, Composition API, and better TypeScript support. As the creator of CoreUI, a widely used open-source UI library, I’ve created numerous Vue 3 projects for enterprise dashboards and admin interfaces, leveraging the latest Vue ecosystem improvements. From my expertise, the most modern approach is to use Vite with npm create vue@latest command. This method provides lightning-fast development server, optimized builds, and seamless integration with the latest Vue 3 features.