This is a solution to the Age calculator app challenge on Frontend Mentor.

• Overview
  • The challenge
• My process
  • Built with
  • What I learned
  • Acknowledgement
• Author

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

• Semantic HTML5 markup
• CSS custom properties
• Flexbox
• Desktop-first workflow
• Typescript
• React - JS library
• Next.js - React framework
• React Hook Form - For form validation
• Zod - For form validation
• Day.js - For date manipulation

It was my first time using Next.js, React Hook Form, Zod and Day.js, which were the biggest challenges, besides making it responsive using media queries in CSS - something I had never done without using a framework like Tailwind CSS before.

There's still a long way to go, specially in making and validating forms, but it was pretty interesting to learn how to use React Hook Form and Zod, definitely a better way to work with forms.

People and resources that helped me get through the challenge.

• Kevin Powell - CSS
• Web Dev Simplified - React/Zod
• Rocketseat - Zod
• Stackoverflow @nickf - Check date validity
• Stackoverflow @jfriend00 - Animate numbers

• @benilio - Frontend Mentor
• Website
• LinkedIn Profile