typescript
TypeScript再入門 ― 「がんばらないTypeScript」で、JavaScriptを“柔らかい”静的型付き言語に
https://employment.en-japan.com/engineerhub/entry/2019/04/16/103000
How to Build a Todo App with React, TypeScript, NodeJS, and MongoDB
https://www.freecodecamp.org/news/how-to-build-a-todo-app-with-react-typescript-nodejs-and-mongodb/