Calculator

Live demo

Summary

This is a simple calculator built in vanilla JavaScript. Done as part of The Odin Project foundations curriculum.

Features

• Maths

  • Handles integers and decimals
  • Handles addition, subtraction, multiplication, and division
  • Prevents user from dividing by 0
  • Large answers are given in scientific notation
  • Answers are rounded to be as precise as possible while fitting in the display

• User experience

  • Responsive layout adjusts to screen height
  • Accepts clicks, keyboard input, and touchscreen input
  • User can string together several operations, with each pair of numbers being evaluated at a time
  • "C" button clears all, "⌫" backspace button deletes most recent digit or character
  • Last equation is displayed in user interface

• Font

  • This project uses Everson Mono Bold by M. Everson.

I learned about...

• Manipulating objects, numbers, and strings
• Responsive & mobile-friendly design
• Testing cross-browser compatibility
• Touchscreen events
• Importing font families