ReactJS Program to Skeleton Loader Block with Explanation
ReactJS
Easy
Component Design
20 views
1 min read
85 words
This problem helps you practice core ReactJS fundamentals in a practical way. It builds intuition around skeleton, block, component. Let’s break it down step by step so you can implement it confidently.
Problem Statement
Create a skeleton block component to show loading UI.
Input Format
No input.
Output Format
Render a React component.
Constraints
Make it reusable with width and height props.
Code Solution
This explanation is written for learning purposes and to help beginners understand the concept clearly.
import React from 'react';
export function Skeleton({ width = 240, height = 14 }) {
return (
<div
style={{ width, height, borderRadius: 999, background: 'linear-gradient(90deg, #e5e7eb, #f3f4f6, #e5e7eb)', backgroundSize: '200% 100%', animation: 'shimmer 1.2s linear infinite' }}
/>
);
}
export default function App() {
return (
<div style={{ padding: 16 }}>
<style>{'@keyframes shimmer { 0% { background-position: 200% 0; } 100% { background-position: -200% 0; } }'}</style>
<Skeleton width={220} />
<div style={{ height: 10 }} />
<Skeleton width={320} />
</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 skeleton block component to show loading UI.
Input / Output
Output
Render a React component.
Constraints
Make it reusable with width and height props.
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 Skeleton({ width = 240, height = 14 }) {
return (
<div
style={{ width, height, borderRadius: 999, background: 'linear-gradient(90deg, #e5e7eb, #f3f4f6, #e5e7eb)', backgroundSize: '200% 100%', animation: 'shimmer 1.2s linear infinite' }}
/>
);
}
export default function App() {
return (
<div style={{ padding: 16 }}>
<style>{'@keyframes shimmer { 0% { background-position: 200% 0; } 100% { background-position: -200% 0; } }'}</style>
<Skeleton width={220} />
<div style={{ height: 10 }} />
<Skeleton width={320} />
</div>
);
}
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