Frontend Mentor – Age calculator app solution

This is a solution to the Age calculator app challenge on Frontend Mentor. Frontend Mentor challenges help you improve your coding skills by building realistic projects.


The challenge

Users should be able to:

  • View an age in years, months, and days after submitting a valid date through the form
  • Receive validation errors if:
    • Any field is empty when the form is submitted
    • The day number is not between 1-31
    • The month number is not between 1-12
    • The year is in the future
    • The date is invalid e.g. 31/04/1991 (there are 30 days in April)
  • View the optimal layout for the interface depending on their device’s screen size
  • See hover and focus states for all interactive elements on the page
  • Bonus: See the age numbers animate to their final number when the form is submitted



My process

Built with

  • Semantic HTML5 markup
  • CSS custom properties
  • Flexbox
  • CSS Grid
  • Mobile-first workflow
  • VueJS – JS library


Website – Guilherme Pinto


View Github