Using createMuiTheme to override default styles on div's, p's, body

Question

This is perhaps a simple Material UI Theme Customization question.

What I want to do is to override the default styling on (and other commo

Answer 1

Here is an example of overriding this aspect of CssBaseline:

import PropTypes from "prop-types";
import { withStyles } from "@material-ui/core/styles";

const styles = theme => ({
  "@global": {
    body: {
      ...theme.typography.body1
    }
  }
});

function MyCssBaseline() {
  return null;
}

MyCssBaseline.propTypes = {
  classes: PropTypes.object.isRequired
};

export default withStyles(styles)(MyCssBaseline);

import React from "react";
import ReactDOM from "react-dom";
import CssBaseline from "@material-ui/core/CssBaseline";
import MyCssBaseline from "./MyCssBaseline";

function App() {
  return (
    <>
      <CssBaseline />
      <MyCssBaseline />
      <span>
        Here is some text in the body that is getting the body1 styling due to
        MyCssBaseline.
      </span>
    </>
  );
}
ReactDOM.render(<App />, document.querySelector("#root"));

Reference: https://material-ui.com/styles/advanced/#global-css