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

• Live Site URL: https://harrisonpeace.com/responsive-calculator-app-using-vanilla-javascript-flexbox-css-grid/

My process

Built with

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

What I learned

This project was a great refresher on using CSS selectors and variables as well as flexbox and CSS grid.

Using the same name for color themes in both the JavaScript and HTML I was able to make the event listener very compact and without any if statements.

themeControlsContainer.addEventListener('click', (e) => {
  root.style.cssText = colorSchemes[e.target.id]; 
  localStorage.setItem('theme', `${e.target.id}`);
}

Using document.documentElement.style.cssText = "INSERT CSS STYLES" to select the root element and update its CSS made updating the color scheme intuitive and easy to execute.

Useful resources

• Box Shadow Generator - Made it alto easier to get the box shadow looking close to the design

Author

• Website - Harrison Peace
• Frontend Mentor - @HarrisonPeace