RPN Calculator

An RPN calculator that's easy to install and use from a mobile phone, even when you're offline. It is a work in progress.

Features

Reverse Polish Notation
Offline, installable Progressive Web App (PWA)
Ergonomic layout for right-handed mobile use
Arbitrary precision with no floating point errors (thanks, decimal.js-light!)
Undo/Redo

Contributing

This app is meant to be simple without much feature bloat, but if you have an idea feel free to create a new issue to discuss it. I may ask you to create a PR.

If you want to report a bug, please create a new issue that includes:

Steps to reproduce the problem beginning with an empty stack
The expected resulting state
The actual resulting state

or better yet, write some test cases that demonstrate the problem and submit a PR that makes them pass 😁.

Run Locally

Clone the project

  git clone https://github.com/dave-burke/rpn-calc.git

Go to the project directory

  cd rpn-calc

Install dependencies

  npm install --workspaces

Start the frontend server

  npm run dev --workspace=frontend

Browse to http://localhost:3000

Deploy

Deploy to AWS (you need the Pulumi CLI and the the AWS CLI installed and configured).

You will also need to update the domain in infra/index.ts to something you own.

  ./deploy-dev.sh

Recommended IDE Setup

Tech Stack

Also, while not exactly part of the "tech stack," one of my motivations for making this was to get better at using CSS Grid layout.

dave-burke/rpn-calc