Customizing Material-UI Library by Replacing Two Classes Selector with My Own Unique Class

One of the challenges I'm facing is styling a Grid element with a custom CSS class called addPanel using makeStyles in React. The issue arises when Material-UI automatically assigns its own classes to the rendered HTML, conflicting with my custom styles. Specifically, Material-UI adds a class like

.MuiGrid-spacing-xs-3 > .MuiGrid-item
, which takes precedence over my single-class selector due to higher specificity.
To address this problem and ensure my custom styles take precedence, I've been exploring ways to increase the CSS selector specificity by utilizing 2 or 3-class selectors on my Grid.
Below is a simplified version of the code snippet showcasing the challenge:

import React from 'react';
import {makeStyles} from "@material-ui/core/styles";
import Grid from "@material-ui/core/Grid";
import TextField from '@material-ui/core/TextField';

const useStyles = makeStyles((theme) => ({
    addPanel: {
        paddingTop: "44px",
        paddingLeft: "50px",
    },
}));

const ManageLocales = (props) => {
    const classes = useStyles();

    return (
        <Grid container spacing={3}>
            <Grid item container xs={8} spacing={3} className={classes.addPanel}>
                <Grid item>
                    <TextField 
                        label="Add country" 
                        variant="outlined" 
                        size="small"
                    />
                </Grid>                            
            </Grid>
        </Grid>
    );
}
export default ManageLocales;

Answer №1

I have discovered a helpful solution. By referring to the information provided on this link, it is possible to create multiple class selectors using the syntax ""&.someMegaClass"". The example code for implementing this solution is as follows:

const useStyles = makeStyles((theme) => ({
    someClass: {
        "&.addPanel": {
            paddingTop: "44px",
            paddingLeft: "50px",
        }
    }
}));

This implementation will generate a CSS selector that appears like this:

.makeStyles-someClass-22.addPanel
. To apply these classes to your div, you can utilize either of these syntaxes:
className={`${classes.someClass} addPanel`}

or
className={classes.someClass + " addPanel"}
. This method allows you to effectively override any existing library CSS selectors by creating your own selectors with higher specificity.

Answer №2

Consider including

::ng-deep {


}

A simple solution to give priority to your custom CSS classes is by wrapping them in ::ng-deep in your stylesheet.

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