Error note: Invalid dom property ---. Did you mean ---?

https://velog.io/@lillynextdoor/class-vs.-className

Why className instead of class??

• In HTML, it is generally common to use class, but in React, class is a reserved word in JavaScript, so className must be used to distinguish it from class.

• HTML is, literally, used to implement text, whereas JS/JSX is JavaScript that supports HTML. Therefore, className is used this way to prevent conflicts with reserved words.