This is a simple yet robust Age Calculator web app built during the CodeAlpha Web Development Internship. It takes a user's date of birth and calculates their age in years, months, and days — with added features like birthday countdown, dark mode toggle, days and hours alive, and input memory.
- HTML — structure and input form
- CSS — responsive styling and layout
- JavaScript — age logic, validation, dynamic UI
- Bonus: Manual Testing practices from TestarsQuarter QA Bootcamp
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- Accepts valid birthdates
- Calculates accurate age (years, months, days)
- Handles edge cases (e.g., leap years, future dates)
- Dark mode toggle
- Copy age result to clipboard
- Clear/Reset button for inputs and results
- Displays total time lived in days, hours, and seconds
- Auto-focuses inputs for seamless data entry
- "Enter" key support for quick calculation
- Saves last input using localStorage
- Countdown to next birthday
- Utilizes UTC for age calculation to ensure universal consistency and precision.
- Fully tested using manual QA test cases (see
TESTING.md)
UTC-Based Date Calculations: The application performs its core age and total time-lived calculations using Universal Coordinated Time (UTC). This design choice ensures that results are consistent globally, independent of the user's local timezone or Daylight Saving Time adjustments, providing precise and unambiguous measurements of time.
Testing inspired by real-life manual testing skills acquired from the TestarsQuarter Bootcamp
To view test cases, scenarios, and evidence:
📁 TESTING.md
Joshua Kolawole (CA/JU3/3835)
- Completed & submitted as Task 1 for CodeAlpha Internship
- Ready for future improvements and make it useful to the world