'Can you use :nth-of-type without a selector and get the same functionality as :first-child? [duplicate]

Trying to address a console warning I'm getting from MUI5/emotion (I think)

The pseudo class ":first-child" is potentially unsafe when doing server-side rendering. Try changing it to ":first-of-type".

So I was curious, what happens if you omit the selector in :first-of-type? I don't see any difference when I do this. Maybe it's ok?

EDIT: ^ This is my question and it is not answered in the question that is being linked too. I only included the emotion bit for context.

css material-ui emotion

Solution 1:^[1]

Maybe it has something to do with browser compatibility. The pseudo class :first-of-type https://developer.mozilla.org/de/docs/Web/CSS/:first-of-type is understood by all browsers. Whereas :first-child is not supported by some. https://developer.mozilla.org/de/docs/Web/CSS/:first-child

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Solution 1