React & JS Cheatsheets by Reed Barger

Old links that are not working anymore:

https://codeartistry.io/10-javascript-concepts-for-react-cheatsheet/
https://codeartistry.io/the-react-2020-cheatsheet/

New links:

https://medium.com/code-artistry/10-javascript-concepts-you-need-to-master-react-cheatsheet-4801f85e8e7e

https://www.freecodecamp.org/news/the-react-cheatsheet-for-2020/