Dictionary (New Word): React (#154)

# Word

#### React

# Meaning/Definition

React is a JavaScript library for building user interfaces (UIs),
especially for web applications.

Here are the key points about React:
	•	Developed by: Facebook (now Meta).
• Component-based: Applications are built using small, reusable pieces
of UI called components.
• Declarative: You describe what the UI should look like, and React
takes care of updating it when data changes.
• Virtual DOM: React uses an in-memory representation of the DOM
(Document Object Model) called the Virtual DOM. This makes updates
faster, since React only changes what’s necessary on the real page.
• Unidirectional data flow: Data flows in one direction (from parent to
child components), making applications easier to debug and maintain.
• Ecosystem: React has a huge ecosystem, with tools like React Router
(for navigation), Redux/Zustand/Recoil (for state management), and
Next.js (for server-side rendering and full-stack apps).

👉 In simple terms: React helps developers build fast, interactive, and
scalable web apps by breaking UIs into components that can update
efficiently when data changes

---------

Co-authored-by: Olabode Lawal-Shittabey <babblebey@gmail.com>

Author: youngmentor

src/content/dictionary/react.mdx

@@ -0,0 +1,19 @@
+---
+layout: ../../layouts/word.astro
+title: "React"
+---
+React is a popular JavaScript library used for building user interfaces, especially web applications. It helps developers build apps by breaking the UI into **components**—small, reusable pieces of code (like buttons, forms, or entire sections of a page).
+
+**Key Ideas**:
+- **Component-based** - build UI in pieces and reuse them.
+- **Virtual DOM** - React updates only the parts of the page that change, making apps faster.
+- **Declarative** - you describe what the UI should look like, and React handles how to update it.
+
+**Example**:
+```jsx
+function Hello() {
+  return <h1>Hello, world!</h1>;
+}
+```
+
+This simple React component shows “Hello, world!” on a webpage.