Frontend Mentor - Interactive card details

This is a solution to the Interactive card details form challenge on Frontend Mentor.

Table of contents

• Overview
  • The challenge
  • Screenshot
  • Links
• My process
  • Built with
  • What I learned
  • 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: Add solution URL here
• Live Site URL: Add live site URL here

My process

Built with

• HTML5
• Javascript
• Tailwind CSS
• Mobile-first workflow

What I learned

Basics of Tailwind CSS

<link rel="stylesheet" href="./tailwind/styles.css">

<label id="error-name" class="text-[12px] tracking-widest text-red-400"></label>

How to use regex

var cardNumber = e.target.value
  .replace(/\D/g, "")
  .replace(/(\d{4})(\d)/, "$1 $2")
  .replace(/(\d{4})(\d)/, "$1 $2")
  .replace(/(\d{4})(\d{1,4})/, "$1 $2")
  .replace(/( \d{4})\d+?$/, "$1");

Useful resources

• Regex examples - This helped me a lot with the regex mask
• Tailwind Website - Docs

Author

• LinkedIn - Bruno Costa
• Frontend Mentor - @BrnCosta
• Twitter - @_brnCosta