What specific style of CSS is utilized in Material UI's `sx` property feature?

I came across this code snippet in the Material UI documentation:

<FormControl
  sx={{
    "& > :not(style)": { m: 1 },
    maxWidth: "100%",
    minWidth: "100%",
  }}
>

It appears that & is not a standard part of CSS.

In the Material UI documentation, it states that the sx prop allows for using a CSS-superset. What specific CSS-dialect is being used here?

Answer №1

Material UI has integrated emotion.sh into its system starting from version 5. If you have any questions about the emotion syntax, you can find more information on the library's official website at .

The symbol "&" (ampersand) serves as a key element for utilizing selectors in emotion, such as &:hover, &:before, and more.

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