Beginner LevelReact JS & React 19
How does the children prop enable component composition and slot layouts?
❓ Interview Prompt: Explain `props.children`, component composition vs inheritance, slot layouts, and wrapper components (Cards, Modals, Layouts).
The 'children' prop is a special prop automatically passed to components containing whatever elements or JSX are nested between their opening and closing tags:
Composition over Inheritance:
React recommends Composition instead of inheritance. Components like 'Card', 'Modal', and 'Layout' act as container slots that accept arbitrary nested JSX via 'children'.
Code Implementation Example
jsx
function Card({ title, children }) {
return (
<div className="card-container">
<h3>{title}</h3>
<div className="card-body">
{children} {/* Renders nested content dynamically */}
</div>
</div>
);
}
// Usage:
function App() {
return (
<Card title="User Profile">
<p>Name: Alice</p>
<button>Edit</button>
</Card>
);
}💡Building reusable container card components using props.children.
🎯 Interview Key Takeaway
Use props.children to create flexible container components and favor composition over class inheritance.
#children#Composition#Props#Beginner
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