Frontend Mentor - Interactive card details form solution

This is a solution to the Interactive card details form challenge on Frontend Mentor. Frontend Mentor challenges help you improve your coding skills by building realistic projects.

Table of contents

• Overview
  • The challenge
  • Screenshot
  • Links
• My process
  • Built with
  • What I learned
  • Continued development
  • Useful resources
• Author

Overview

The challenge

Users should be able to:

• Fill in the form and see the card details update in real-time
• Receive error messages when the form is submitted if:
  • Any input field is empty
  • The card number, expiry date, or CVC fields are in the wrong format
• View the optimal layout depending on their device's screen size
• See hover, active, and focus states for interactive elements on the page

Screenshot

Links

• Solution URL: mySolution
• Live Site URL: liveSite

My process

Built with

• Semantic HTML5 markup
• CSS custom properties
• Flexbox
• Mobile-first workflow
• React - JS library
• SCSS - For styles

What I learned

.card-wrapper {
  background-image: url(../../images/bg-main-mobile.png);
  height: 64vw;
  background-repeat: no-repeat;
  background-position-y: 0vw;
  background-size: cover;
  margin-bottom: 5rem;

  img.img-tarjeta {
    width: 100%;
  }

  .card {
    position: relative;
  }

  & .back-card {
    width: 76%;
    right: -21%;
    top: 8vw;

Position Absolute it nos always the best way to position "floating" elements.

const NormaliceNumber = (value, length) => {
  const newValue = value?.replace(/[^\dA-Z]/g, '').substr(0, length).trim().padStart(length, '0') || '';

  return newValue;
};

.padStart() new adition yo my knowledge

Continued development

I need to go deep in form validations and how to control input values.

Useful resources

• normalizeCardNumber - This helped me for normalizing tha card number with the pattern #### #### #### ####

Author

• Website - Cintia Jimena Martinez
• Frontend Mentor - @KatuGT
• Linkedin - Cintia Jimena Martinez