Component composition means building larger [React](/courses/reactjs) interfaces by combining smaller components together. Instead of creating one massive component: ```jsx function Dashboard() { return (

{/* header code */} {/* sidebar code */} {/* statistics code */} {/* activity code */} {/* footer code */}

); } ``` you can compose specialized components: ```jsx function Dashboard() { return (

); } ``` ### Think in Building Blocks ```text Small components ↓ Combined together ↓ Feature ↓ Complete page ``` For example: ```text Avatar + UserName + FollowButton ↓ UserCard ``` Then: ```text UserCard + PostContent + Comments ↓ Post ``` ### Composition Through children One of [React](/courses/reactjs)'s most common composition mechanisms is `children`: ```jsx function Card({ children }) { return

{children}

; } ``` Usage: ```jsx

React Hooks

Learn React Hooks in depth.

``` `Card` controls the surrounding structure while the parent controls what goes inside it. ### Composition Through Props Components can also receive elements as props: ```jsx function PageLayout({ sidebar, content }) { return (

{content}

); } ``` ### Interview-Ready Answer Composition in React is the practice of building complex interfaces by combining smaller components. React supports composition through normal component nesting, `children`, and props containing React elements. It promotes reusable, flexible components while keeping responsibilities separated.