Hey! Just so you know, this article is over 2 years old. Some of the information in it might be outdated, so take it with a grain of salt. I'm not saying it's not worth a read, but don't take everything in it as gospel. If you're curious about something, it never hurts to double-check with a more up-to-date source!
Optional chaining allows us to reference keys if the parent value is defined, as well as reference methods on values when available (e.g. .toUpperCase).
Optional Chaining - CodeSandbox
Optional Chaining by whatjackhasmade using normalize.css, react, react-dom, react-scripts