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

• Frontend Mentor - Todo app solution
  • 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: https://github.com/erelropeta/fem-todo-app-main
• Live Site URL: https://todo-app-erj.netlify.app/

My process

Built with

• Semantic HTML5 markup
• CSS custom properties
• Flexbox
• Mobile-first workflow
• BEM - CSS methodology
• React - JS library

What I learned

• Getting preferred color scheme of the user

window
  .matchMedia('(prefers-color-scheme: dark)')
  .addEventListener('change', (e) =>
    e.matches ? setDarkTheme(true) : setDarkTheme(false)
  );

• Responsive sizing using clamp() has a computation

Instead of computing for all sizing (font-size, margin, etc.), I utilized Marc Bacon's Clamp() Function Calculator. I used clamp() from screen width 768px because it wasn't giving the right size on mobile view (375px).

• Utilizing useState instead of using useEffect

const getFilteredTodos = (todos, filter) => {
  if (filter === 'active') {
    return todos.filter((todo) => !todo.isComplete);
  } else if (filter === 'completed') {
    return todos.filter((todo) => todo.isComplete);
  } else {
    return todos;
  }
};

const visibleTodos = getFilteredTodos(todoList, filterBy);

Continued development

Useful resources

• React Beautiful DnD - For the smooth drag and drop feature.
• Clamp() Function Calculator - For calculating the responsive sizing of texts, widths, etc.
• You Might Not Need an Effect - Wonderful tutorial in utilizing the power of state instead of unnecessarily using useEffect.

Author

• LinkedIn - Erel Ropeta
• Frontend Mentor - @ereljapco