The styles are not being successfully applied to the Material UI Menu component within a React application

I recently started working with material-UI. I have a menu component that looks like this:

<Menu
    classes={{ paper: css.paperMenu }}
    className={classNames({
      [css.menuMarginTop]: true
    })}
>

.menuMarginTop {
  margin-top: 14px;
}

In addition to these, there are other props as well. However, when I try to apply styles based on a prop, the style menuMarginTop does not get applied. Can someone please help me figure out how to do this?

Thank you.

Answer №1

It appears that you are utilizing regular CSS, however material-UI utilizes JSS as their styling solution. You can explore their styling solutions here, and learn how to customize the CSS of components here.

You have the option to do this in your specific case.

import Menu from "@material-ui/core/Menu";
import { makeStyles } from "@material-ui/core/styles";

const useStyles = makeStyles(theme => ({
  paperMenu: {
    color: "red"
  },
  menuMarginTop: {
    color: "blue"
  }
}));

export default function App(props) {
  const classes = useStyles();
  return (
    <Menu
      classes={{ paper: classes.paperMenu }}
      className={classes.menuMarginTop}
    />
  );
}

In this code snippet, classes.paperMenu will override the underlying paper (component) class, while menuMarginTop will be applied to the root element of the Menu component. Material-UI generates unique class names randomly at runtime, so fixed class names cannot be relied upon like in other libraries. The only way to override the underlying class is by using the classes prop, as explained further in the links above.

Keep in mind that this is just one method of overriding classes; there are alternative methods such as Higher Order Components like withStyles or withTheme. Additional information can be found in the provided links.

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