Frontend Mentor - Intro component with sign up form solution

This is a solution to the Intro component with sign up 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:

• View the optimal layout for the site depending on their device's screen size
• See hover states for all interactive elements on the page
• Receive an error message when the form is submitted if:
  • Any input field is empty. The message for this error should say "[Field Name] cannot be empty"
  • The email address is not formatted correctly (i.e. a correct email address should have this structure: name@host.tld). The message for this error should say "Looks like this is not an email"

Screenshot

Links

• Solution URL: Solution
• Live Site URL: Live

My process

Built with

• Semantic HTML5 markup
• CSS custom properties
• Flexbox
• Vanilla JavaScript

What I learnt

This project taught me about email validation. Also, when the form is submitted, how to add an error message to an input field.

Here are some code snippets I am proud of:

// If the field is empty the .error class will be displayed
if (!input.value) {
  input.parentElement.classList.add("error");
} else {
  input.parentElement.classList.remove("error");
}

// If the email is validated no error will be displayed
if (input.type == "email") {
  if (validateEmail(input.value)) {
    input.parentElement.classList.remove("error");
  } else {
    // Show error if email address is not formatted correctly
    input.parentElement.classList.add("error");
  }
}

Useful resources

• Client-side form validation - This helped me to understand what client-side form validation is and why it's important.

Author

• Website - Max Lockwood
• Frontend Mentor - @Max88-git
• Twitter - @maxlockwood88