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
  • Useful resources
• Author

Overview

The challenge

Build out a calculator app and get it looking as close to the reference design as possible.

Users should be able to:

• See the size of the elements adjust based on their device's screen size
• Perform mathematical 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

• Theme 1
  • Mobile
  • Desktop
• Theme 2
  • Mobile
  • Desktop
• Theme 3
  • Mobile
  • Desktop

Reference Images

• Theme 1
  • Mobile
  • Desktop
• Theme 2
  • Mobile
  • Desktop
• Theme 3
  • Mobile
  • Desktop

Links

• Solution URL
• Repository URL
• Live Site URL

My process

Built with

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

Useful resources

• A Modern CSS Reset
• A Complete Guide to Flexbox
• A Complete Guide to Grid
• How to build a Calculator App with JavaScript: Updated calculator code to enable better functionality.
• JS calculator, respecting order of operations: Adapted the calculator code from the previous link to honor order of operations using the code from this location.

Author

• Website - www.richardcyrus.com
• Frontend Mentor - @richardcyrus