ReactJS Program to Table Row Component with Explanation
ReactJS
Medium
Component Design
25 views
1 min read
85 words
This problem helps you practice core ReactJS fundamentals in a practical way. It builds intuition around table, component, render. Let’s break it down step by step so you can implement it confidently.
Problem Statement
Create a small table component that renders rows from data.
Input Format
No input.
Output Format
Render a React component.
Constraints
Use proper table tags and map rows.
Code Solution
This explanation is written for learning purposes and to help beginners understand the concept clearly.
import React from 'react';
const rows = [
{ topic: 'HTML', level: 'Easy' },
{ topic: 'CSS', level: 'Medium' },
{ topic: 'React', level: 'Hard' }
];
export default function App() {
return (
<div style={{ padding: 16 }}>
<table style={{ borderCollapse: 'collapse', width: 420 }}>
<thead>
<tr>
<th style={{ border: '1px solid #ddd', padding: 8, textAlign: 'left' }}>Topic</th>
<th style={{ border: '1px solid #ddd', padding: 8, textAlign: 'left' }}>Level</th>
</tr>
</thead>
<tbody>
{rows.map((r) => (
<tr key={r.topic}>
<td style={{ border: '1px solid #ddd', padding: 8 }}>{r.topic}</td>
<td style={{ border: '1px solid #ddd', padding: 8 }}>{r.level}</td>
</tr>
))}
</tbody>
</table>
</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 small table component that renders rows from data.
Input / Output
Output
Render a React component.
Constraints
Use proper table tags and map rows.
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).
Difficulty
Medium
ReactJS
Official Solution
import React from 'react';
const rows = [
{ topic: 'HTML', level: 'Easy' },
{ topic: 'CSS', level: 'Medium' },
{ topic: 'React', level: 'Hard' }
];
export default function App() {
return (
<div style={{ padding: 16 }}>
<table style={{ borderCollapse: 'collapse', width: 420 }}>
<thead>
<tr>
<th style={{ border: '1px solid #ddd', padding: 8, textAlign: 'left' }}>Topic</th>
<th style={{ border: '1px solid #ddd', padding: 8, textAlign: 'left' }}>Level</th>
</tr>
</thead>
<tbody>
{rows.map((r) => (
<tr key={r.topic}>
<td style={{ border: '1px solid #ddd', padding: 8 }}>{r.topic}</td>
<td style={{ border: '1px solid #ddd', padding: 8 }}>{r.level}</td>
</tr>
))}
</tbody>
</table>
</div>
);
}
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