Erleh / age-calculator-app

Age calculator app made using React. Functional calculation and added animation for number transitions.

Frontend Mentor - Age calculator app solution

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

Links

• Live Site URL: [https://erleh.github.io/age-calculator-app/]

My process

Built with

• CSS custom properties
• Flexbox
• Mobile-first workflow
• React - JS library

What I learned

I used this project to familiarize myself more with React. In the process, I learned to: use vite to initialize a React project, React components - subcomponents to build out my UI, conditional jsx for responsive UI, React use-state for persistant component data, and react-spring for animations. I also used this project to build out my UI with mobile first in mind, contrare to my usual approach.

Useful resources

• [https://www.youtube.com/watch?v=yo2bMGnIKE8] - This video helped me to deploy my React app onto github pages which I initially had some trouble with.

• [https://react.dev/learn/state-as-a-snapshot] - React.dev has great documentation on the fundamentals of using React