JavaScript Countdown Timer | Days, Hours, Minutes, Seconds
Build a dynamic countdown timer using HTML, CSS, and Vanilla JavaScript.
Perfect for website launches, events, and “coming soon” pages.
👉 Portfolio-ready JavaScript project | Week 14
🚀 What You’ll Build
In this tutorial, you’ll create a fully functional, real-time countdown timer that dynamically updates days, hours, minutes, and seconds.
This project teaches core JavaScript time logic used in real websites like:
Product launches
Event countdowns
New Year countdowns
Coming soon pages
🧠 What You’ll Learn
JavaScript Date & time calculations
Milliseconds → days, hours, minutes, seconds
setInterval() & interval cleanup
Dynamic DOM updates
Zero-padding & UI formatting
Smooth number transitions
This is a must-have frontend portfolio project.
⏱️ Chapters (Outcome-Based)
00:00 – Why Countdown Timers Matter
00:19 – Live Countdown Demo
02:29 – Project Setup
04:10 – Countdown Heading
05:21 – Base UI Styling
06:48 – Countdown Layout
12:17 – DOM & Core Logic
15:46 – Countdown Engine
18:36 – Time in Milliseconds
21:05 – Days, Hours, Minutes, Seconds
23:59 – Zero Padding & Display
26:41 – Dynamic Total Days
29:36 – Custom Target Date
32:03 – Interval Control
32:47 – Number Animation
36:01 – Bug Fixes & Final Test
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📂 Check out the source code for this project on GitHub!
👉 [https://github.com/codehuntersharath/...]
If you find this project helpful in your JavaScript learning, make sure to ⭐ star the repository to show your support!
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