ReactJS Program to Prop Validation Without Libraries with Explanation
ReactJS
Easy
Component Design
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1 min read
86 words
This problem helps you practice core ReactJS fundamentals in a practical way. It builds intuition around prop, component, react. Let’s break it down step by step so you can implement it confidently.
Problem Statement
Create a component that safely handles missing props using defaults.
Input Format
No input.
Output Format
Render a React component.
Constraints
Do not crash when props are undefined.
Code Solution
This explanation is written for learning purposes and to help beginners understand the concept clearly.
import React from 'react';
export function Welcome({ name = 'friend' }) {
return <h1 style={{ margin: 0 }}>Welcome to meetcode, {name}.</h1>;
}
export default function App() {
return (
<div style={{ padding: 16 }}>
<Welcome />
<Welcome name='Aman' />
</div>
);
}
Output Example
No sample I/O is provided for this question.
Common Mistakes
- Misreading input/output format.
- Not handling constraints and edge cases.
- Off-by-one errors in loops.
- Forgetting to reset variables between test cases (if any).
Solution Guide
Problem
Create a component that safely handles missing props using defaults.
Input / Output
Output
Render a React component.
Constraints
Do not crash when props are undefined.
Details
Common Mistakes
- Misreading input/output format.
- Not handling constraints and edge cases.
- Off-by-one errors in loops.
- Forgetting to reset variables between test cases (if any).
Official Solution
import React from 'react';
export function Welcome({ name = 'friend' }) {
return <h1 style={{ margin: 0 }}>Welcome to meetcode, {name}.</h1>;
}
export default function App() {
return (
<div style={{ padding: 16 }}>
<Welcome />
<Welcome name='Aman' />
</div>
);
}
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