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

• Desktop

• Mobile

Links

• Solution URL
• Live Site URL

My process

Built with

• Semantic HTML5 markup
• Sass
• Flexbox
• Mobile-first workflow
• TypeScript
• Vite for development and build process
• GitHub Pages for deployment

What I learned

Clear all error when the input field get re-focused after submission. Javascript was essentially used to manage the form states.

In the styling part, I break the UI into manageable components and use as many utilities classes as possible to reduce the amount of custom styling. However, I purge the final css of all unused utility classes to ensure the final css is as small as possible.

// Generate font-weight utility classes with responsive variants
@each $weight, $value in $font-weights {
	.text-#{$weight} {
		font-weight: #{$value};
	}
}

// Generate font-style utility classes with responsive variants
@each $style, $value in $font-styles {
	.text-#{$style} {
		font-style: #{$value};
	}
}

// Generate text-align utility classes with responsive variants
@each $align, $value in $text-aligns {
	.text-#{$align} {
		text-align: #{$value};
	}
}

// Generate font-weight utility classes with responsive variants
@each $weight, $value in $font-weights {
	@each $breakpoint, $breakpoint-value in $breakpoints {
		@media screen and (min-width: #{$breakpoint-value}) {
			@at-root .#{$breakpoint}-text-#{$weight} {
				font-weight: #{$value};
			}
		}
	}
}

// Generate font-style utility classes with responsive variants
@each $style, $value in $font-styles {
	@each $breakpoint, $breakpoint-value in $breakpoints {
		@media screen and (min-width: #{$breakpoint-value}) {
			@at-root .#{$breakpoint}-text-#{$style} {
				font-style: #{$value};
			}
		}
	}
}

// Generate text-align utility classes with responsive variants
@each $align, $value in $text-aligns {
	@each $breakpoint, $breakpoint-value in $breakpoints {
		@media screen and (min-width: #{$breakpoint-value}) {
			@at-root .#{$breakpoint}-text-#{$align} {
				text-align: #{$value};
			}
		}
	}
}

// Add event listener on the form to remove invalid classes from all inputs when any input is focused
formEl.addEventListener('focusin', (e) => {
	// Check if the event target is an input
	if (e.target instanceof HTMLInputElement) {
		const inputs = formEl.querySelectorAll('input') as NodeListOf<HTMLInputElement>;
		const errors = formEl.querySelectorAll('.error-message') as NodeListOf<HTMLElement>;

		// Loop through all input elements and remove invalid classes from all
		inputs.forEach((input) => {
			input.classList.remove('invalid');
			if (input.parentElement) {
				input.parentElement.classList.remove('invalid');
			}
		});

	// Update error messages on the form
	errors.forEach((error) => {
		error.innerText = '';
	});
	}
});

Continued development

I plan to explore advanced SASS features to enhance the maintainability and scalability of my stylesheets. I also intend to further integrate TypeScript in future frontend projects to reinforce type safety and streamline debugging.

Useful resources

• CSS-Tricks: Flexbox Guide - This guide was instrumental in implementing the flexible layout of the component.
• MDN Web Docs: CSS Display Property - Helped me with controlling element visibility.
• Frontend Mentor Community - Engaging with other developers in the community provided insights and useful tips for handling responsive layouts.

Author

👤 Engr. Animashaun Fisayo

• GitHub
• Twitter
• LinkedIn
• Website
• Blog

Acknowledgments

This project was completed as part of the Frontend Mentor challenge. The platform provided an excellent opportunity to practice and refine my front-end skills through realistic project challenges.