Calculator

This is an implementation of a simple calculator.

Version number: 5b8d0fd276b6d288905ed2f63a934e057e8feca2

Getting started

As usual, run:

The project (by default) runs on localhost:8080.

All logic (CalculatorState class) was written using TDD approach.
Buttons are animated for increased immersion.
Branding was embedded as a core functionality instead of ugly, unnecessary footer everyone wishes to remove.
100% automation via IaaC (CloudFormation) and CI/CD (Code Pipelines, Code Build, S3 bucket with static hosting).
There is a limited number of operators implemented following an Open-Closed principle enabling their easy extension without need for modification of any existing functional code.
Responsiveness to the device size is limited: the minimum device width is 300px and the calculator doesn't change its proportions. Extended responsiveness would require at least fundamental UX research based on the real product purpose and applications.
There is no support for decimal operations as this would involve additional effort of handling 64-bit binary format IEEE 754 precision issues.
There is no support for keydown operations.
There is no backspace operator.