Build a Digital Alarm Clock with JavaScript (Real-Time Project)
Build a real-time digital clock with alarm using HTML, CSS, and Vanilla JavaScript.
A portfolio-ready frontend project with alarm logic & sound.
👉 Full source code + step-by-step explanation | Week 13
🚀 What You’ll Build
In this project, you’ll create a fully functional digital clock with alarm support, including real-time updates, alarm scheduling, validation, and audio playback.
You’ll learn how to:
Display real-time date & time
Schedule alarms using JavaScript logic
Calculate time differences accurately
Trigger alarm sounds
Handle intervals, validation & UI state
Structure a real-world frontend project
This is a logic-heavy JavaScript project — perfect for frontend portfolios and interviews.
⏱️ Chapters (Outcome-Based)
00:00 – Why This Project Is Portfolio-Worthy
00:24 – Live Digital Clock & Alarm Demo
02:27 – Project Setup
04:52 – Display Current Date & Time
06:30 – Base UI Styling
08:17 – DOM Setup & Core Functions
10:02 – Live Date Logic
12:49 – Live Time Logic
15:03 – Time Formatting
16:16 – Digital Font Styling
18:25 – Alarm UI Section
26:17 – Dynamic Alarm Time Selection
29:44 – Alarm Difference Calculation
31:20 – Alarm Logic Engine
37:16 – Alarm Validation
38:17 – Start & Stop Alarm
43:55 – Alarm Audio Integration
47:02 – 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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