Frontend Mentor - Todo app solution

This is a solution to the Todo app 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:

• View the optimal layout for the app depending on their device's screen size
• See hover states for all interactive elements on the page
• Add new todos to the list
• Mark todos as complete
• Delete todos from the list
• Filter by all/active/complete todos
• Clear all completed todos
• Toggle light and dark mode
• Bonus: Drag and drop to reorder items on the list

Screenshot

Links

• Solution URL: GitHub
• Live Site URL: GitHub Live

My process

Built with

• Semantic HTML5 markup
• CSS custom properties
• Flexbox
• Mobile-first workflow

What I learned

This is the drag and drop code below:

listItem.draggable = true;

        listItem.addEventListener('dragstart', e => {
            draggedItem = e.target;
        });

        listItem.addEventListener('dragover', e => {
            e.preventDefault();
        });

        listItem.addEventListener('dragenter', e => {
            e.target.classList.add('drag-over');
        });

        listItem.addEventListener('dragleave', e => {
            e.target.classList.remove('drag-over');
        });

        listItem.addEventListener('drop', e => {
            e.target.classList.remove('drag-over');
            if (draggedItem !== null) {
                const items = Array.from(itemsList.getElementsByClassName('list-item'));
                const currentIndex = items.indexOf(e.target);
                const draggedIndex = items.indexOf(draggedItem);
                if (currentIndex > draggedIndex) {
                    itemsList.insertBefore(draggedItem, e.target.nextSibling);
                } else {
                    itemsList.insertBefore(draggedItem, e.target);
                }
                draggedItem = null;
            }
        });

Continued development

I need to learn how to do implement more advanced interactive features such as the drag and drop.

Useful resources

• W3Schools - This site helps me whenever I need a reminder of how to use certain code
• ChatGPT - This helped me with the code for the dragg & drop feature

Author

• Frontend Mentor - @rnsnceman
• Instagram - @yurikoller