Can you explain the significance of angle brackets in JavaScript?

After examining the JSX code example provided, I found it to be quite intriguing.

const AppBar = styled(MuiAppBar, {
  shouldForwardProp: (prop) => prop !== 'open',
})<AppBarProps>(({ theme, open }) => ({
  zIndex: theme.zIndex.drawer + 1,
  transition: theme.transitions.create(['width', 'margin'], {
    easing: theme.transitions.easing.sharp,
    duration: theme.transitions.duration.leavingScreen,
  }),
  ...(open && {
    marginLeft: drawerWidth,
    width: `calc(100% - ${drawerWidth}px)`,
    transition: theme.transitions.create(['width', 'margin'], {
      easing: theme.transitions.easing.sharp,
      duration: theme.transitions.duration.enteringScreen,
    }),
  }),
}));

However, I am confused about the significance of <AppBarProps>.

Although the remainder of the code is clear to me, this specific part has left me puzzled.

I apologize if my question seems basic, but I would appreciate some clarification on this matter.

Answer №1

One method in TypeScript to define a generic type parameter is using the generic keyword. The function `styled` acts as a higher-order component (HOC) that creates a styled version of a component by attaching styles. Let's break down the code for better understanding:

const hoc = styled(MuiComponent)

// StyledMuiComponent can now receive props of type MuiComponentProps
const StyledMuiComponent = hoc<MuiComponentProps>(styles)

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