This is a basic calculator app built by following this guide: https://www.freecodecamp.org/news/how-to-build-an-html-calculator-app-from-scratch-using-javascript-4454b8714b98
I'm still learning both TypeScript and React. Converting a Javascript app into React + TypeScript taught me quite a lot about its inner workings.
Next.js + Tailwind CSS + TypeScript starter packed with useful development features.
https://github.com/theodorusclarence/ts-nextjs-tailwind-starter
Made by Theodorus Clarence