A calculator project built with HTML, CSS, and JavaScript
as part of The Odin Project – Foundations Path.
This project demonstrates building a functional calculator interface with basic arithmetic operations, a responsive design, and clean, interactive UI.
👉 https://top-submissions.github.io/foundations-calculator/
The calculator supports:
- Basic arithmetic operations: addition, subtraction, multiplication, division
- Special buttons: clear, negate, decimal, backspace
- Interactive button feedback and styling
- Real-time input display
The project focuses on DOM manipulation, event handling, and JavaScript logic implementation.
- Functional calculator with all standard operations
- Interactive buttons with hover and active states
- Input validation to prevent invalid operations (e.g., division by zero)
- Responsive design for desktop and mobile
- Simple, clean interface using CSS variables for consistent styling
- HTML5: Semantic markup for calculator structure
- CSS3: Styling, responsive layout, variables, and hover effects
- JavaScript (ES6): DOM manipulation, event listeners, and calculation logic
- Each button triggers an event listener in
script.js - Number buttons append digits to the input display
- Operator buttons handle calculations and store operands
- Special buttons handle clear, negate, decimal, and backspace
- The script ensures valid operations and updates the display in real-time
- DOM manipulation and event handling in vanilla JavaScript
- Structuring HTML and CSS for a calculator interface
- Implementing responsive design
- Using CSS variables and consistent styling
- Debugging and fixing logical errors in JavaScript
MatimotTheTimoters GitHub: https://github.com/Chonky_Seal