What Vue.js Is and Why Developers Love It

A progressive framework

Vue.js is a JavaScript framework for building user interfaces. It is called “progressive” because you can adopt it incrementally – drop it into one page of an existing site, or use its full ecosystem to build a large single-page application. Its reputation is for being approachable: gentle learning curve, excellent documentation, and clean templates.

Reactivity is the core idea

You describe your UI in terms of state, and Vue keeps the DOM in sync automatically. Change a value and every part of the page that uses it updates – you never touch the DOM by hand.

Vue vs React vs Angular

• React is a library with JSX and a large ecosystem; very flexible, more decisions to make.
• Angular is a full, opinionated framework with TypeScript and lots of built-in structure.
• Vue sits in between: batteries-available but not overwhelming, with a template syntax close to plain HTML.

Vue 3 and the Composition API

This course uses Vue 3 with the modern Composition API and <script setup>, the recommended style today. It organises component logic by feature rather than by option, and works beautifully with TypeScript.

Key points

• Vue is a progressive UI framework – adopt a little or a lot.
• You describe state; Vue keeps the DOM in sync automatically (reactivity).
• It balances React's flexibility and Angular's structure, with HTML-like templates.
• Vue 3's Composition API with <script setup> is the modern approach.