Age Calculator (Years/Months/Days)

Age Calculator

Select Date of Birth

Date cannot be in the future!

- Years

- Months

- Days

 Features Explained

1. Leap Year & Month Accuracy: The script uses new Date(year, month, 0).getDate() to dynamically find how many days are in the preceding month. This ensures that if you were born on the 31st and today is the 30th, the day calculation remains precise.

2. Input Validation: The max attribute on the HTML5 date input is set via JavaScript to today. This prevents users from selecting future dates through the native browser picker.

3. Visual Animation: I've added an animateValue function. Instead of the numbers just "snapping" into place, they count up rapidly, giving the tool a premium, interactive feel.

4. Responsive Grid: The result boxes use grid-template-columns: repeat(3, 1fr), which automatically scales down for smaller screens while keeping the "Years, Months, Days" aligned.

 

 

Features Explained

1. Leap Year & Month Accuracy: The script uses new Date(year, month, 0).getDate() to dynamically find how many days are in the preceding month. This ensures that if you were born on the 31st and today is the 30th, the day calculation remains precise.

2. Input Validation: The max attribute on the HTML5 date input is set via JavaScript to today. This prevents users from selecting future dates through the native browser picker.

3. Visual Animation: I've added an animateValue function. Instead of the numbers just "snapping" into place, they count up rapidly, giving the tool a premium, interactive feel.

4. Responsive Grid: The result boxes use grid-template-columns: repeat(3, 1fr), which automatically scales down for smaller screens while keeping the "Years, Months, Days" aligned.