CSS Program to Simple Fade In with Explanation
CSS
Medium
Transitions & Animations
33 views
1 min read
86 words
This problem helps you practice core CSS fundamentals in a practical way. It builds intuition around fade, keyframe, animation. Let’s break it down step by step so you can implement it confidently.
Problem Statement
Make a box fade in using keyframes animation.
Input Format
No input.
Output Format
Print the HTML+CSS code in one block.
Constraints
Use @keyframes and animation property.
Code Solution
This explanation is written for learning purposes and to help beginners understand the concept clearly.
<!doctype html>
<html lang='en'>
<head>
<meta charset='utf-8'>
<meta name='viewport' content='width=device-width, initial-scale=1'>
<title>meetcode</title>
<style>
@keyframes fadeIn {
from { opacity: 0; transform: translateY(6px); }
to { opacity: 1; transform: translateY(0); }
}
.card { width: 340px; border: 1px solid #eee; border-radius: 14px; padding: 14px; animation: fadeIn 450ms ease; }
</style>
</head>
<body>
<div class='card'>Fade in meetcode card</div>
</body>
</html>
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
Make a box fade in using keyframes animation.
Input / Output
Output
Print the HTML+CSS code in one block.
Constraints
Use @keyframes and animation property.
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
<!doctype html>
<html lang='en'>
<head>
<meta charset='utf-8'>
<meta name='viewport' content='width=device-width, initial-scale=1'>
<title>meetcode</title>
<style>
@keyframes fadeIn {
from { opacity: 0; transform: translateY(6px); }
to { opacity: 1; transform: translateY(0); }
}
.card { width: 340px; border: 1px solid #eee; border-radius: 14px; padding: 14px; animation: fadeIn 450ms ease; }
</style>
</head>
<body>
<div class='card'>Fade in meetcode card</div>
</body>
</html>
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