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
• Author

Overview

The challenge

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

Links

• Solution URL: Git
• Live Site URL: Calculator

My process

I started by planning out how to do the theme switcher first, then put everything into the HTML and styled it with CSS. Then I figured out how to use Javascript to check prefers-color-scheme and change themes by switching an alternative stylesheet. The alternative style sheets only contained color data in the form of CSS variables. Then I used javascript to disable double tap zoom, perform input verification and swap * for x on the screen.

Built with

• Semantic HTML5 markup
• CSS custom properties
• Flexbox
• Javascript

What I learned

I learned how to style radial buttons and theme switch using javascript.

Author

• Website - David Dyer
• Frontend Mentor - @davidbdeath

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