Frontend Mentor - Calculator app solution

This is a solution to the Calculator 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
  • Useful resources
• Author

Overview

The challenge

Users should be able to:

• See the size of the elements adjust based on their device's screen size
• Perform mathmatical operations like addition, subtraction, multiplication, and division
• Adjust the color theme based on their preference
• Bonus: Have their initial theme preference checked using prefers-color-scheme and have any additional changes saved in the browser

Screenshot

Links

• Solution URL: https://github.com/NDOY3M4N/calculator-app
• Live Site URL: https://ndoy3m4n.github.io/calculator-app/

My process

Built with

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

What I learned

I learned how to detect the user's color preference scheme in JavaScript with window.matchMedia.

const lightTheme = window.matchMedia('(prefers-color-scheme: light)').matches

This will return true if light mode is enabled.

Useful resources

• How to detect dark mode using JavaScript - This article explains how to use matchMedia to detect dark/light mode

Author

• Frontend Mentor - @NDOY3M4N
• Twitter - @NDOY3M4N