Build a Calculator with Vanilla JavaScript – Full Tutorial
🧮 Learn how to build a complete working calculator using only Vanilla JavaScript – no frameworks, no external libraries!
This beginner-to-intermediate tutorial walks you through every step of creating a fully functional calculator with proper math logic, state management, and clean code.
You'll learn:
• Managing calculator state (current/previous operand, operation)
• Handling number & decimal input
• Performing calculations (+ − × ÷)
• Chaining operations correctly
• Clear, Clear Entry, and Backspace functions
• Preventing errors like multiple decimals or divide by zero
Great project to level up your JavaScript skills
✅ Features:
Real-time display updates
Proper calculation order
Clean result formatting
Full button functionality (C, CE, ⌫, =)
📂 Source code:https://github.com/AlexanderBlaq723/js-ass...
🔔 Subscribe for more Vanilla JS projects!