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
• Acknowledgments

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: Github
• Live Site URL: GithubPages

My process

Built with

• Semantic HTML5 markup
• CSS
• Flexbox
• Mobile-first workflow
• Git
• React - JS library
• Github Pages

What I learned

The pseudo-class :invalid to use input validation to apply a style to another element:

input:invalid[focused="true"] ~ span {
    display: block;
}

<span className="input__error--text">{errorMsg}</span>

The useContext was the tool that I used to share state and functions with other components in different files, learned how to create the provider, and consume the context where it's needed.

import React, { useState, createContext } from "react";

export const InfoContext = createContext();

Continued development

• managing state
• react hooks
• form validation

Useful resources

• How to do input masks[PTBR] - This helped me create the mask used in the card number.
• React form validation - This was the approach that I used to implement the form validation.
• React hook useContext - Great video explaing the useContext hook.

Author

• Frontend Mentor - @allfigueiredodev

Acknowledgments

Shout out to those people creating content to help others make their way into development.

• Frontend Mentor - Frontend Mentor
• Fernando Daciuk - queroser.ninja - Fernando Daciuk
• Lama Dev - Lama Dev
• Simo Edwin - developedbyed