What is Virtual DOM?
A lightweight copy of the page that React uses to figure out what needs to change
Why It Matters
The Virtual DOM makes updates efficient by only changing what's actually different
Real-World Example
When one item in a list changes, React only updates that item, not the whole list
Related Terms
Learn More at buildDay Melbourne
Want to understand these concepts hands-on? Join our one-day workshop and build a real web application from scratch.
Related Terms
React
A popular tool for building user interfaces, created by Facebook, that makes complex UIs easier to manage
Component
A reusable building block of a user interface that can be combined to create complex pages
Rendering
The process of turning your code and data into the visual display users see
Frontend
The part of a website or app that users see and interact with directly
Next.js
A framework built on React that adds features like page routing, server-side rendering, and API handling
CSS
The language that controls how websites look, including colours, fonts, spacing, and layout