Quote :
Hey @jaredpalmer, sorry if you answered it before, but I was wondering while reading Formik’s TypeScript guidelines, why is `null` so vehemently advised against? Why prefer `undefined`?
— Sarah Dayan (@frontstuff_io) December 20, 2020
Anything to do with @sindresorhus’s post from 2 years ago? https://t.co/XfCtjrQBVa
Like many parts of js, you should just avoid them.