[react] Support transpiled library for globalCss
and keyframes
#155
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Found this bug from mui/material-ui#42640
Root cause
The code of CssBaseline looks like this:
However, after building Material UI as a package and Next.js import it, the code before passing to Pigment is:
Notice that the value passed to
globalCss
is a variable instead of a function. Pigment CSS thinks that it's not a function, that's why the CSS does not generated (with Emotion error):The fix is simple, we check the type after the evaluation and then pass the theme if it's a function.