Using material-ui's APIs, how do I set a background image in the body?

Question

I want to set a background image in the body of my web app using material-ui-next's CSS-in-JS, withStyles, or themes? I would like to avoid using an external CSS file if possible.

Answer 1

You can inject css into the outer scope with "@global" using withStyles from "@material-ui/core/styles"

import React, { Fragment } from "react";
import CssBaseline from "@material-ui/core/CssBaseline";
import { withStyles } from "@material-ui/core/styles";
import Main from "./Main";

const styles = theme => ({
	"@global": {
		body: {
			backgroundImage: "url('/media/landing.jpg')",
			backgroundRepeat: "no-repeat",
			backgroundPosition: "center center",
			backgroundSize: "cover",
			backgroundAttachment: "fixed",
			height: "100%"
		},
		html: {
			height: "100%"
		},
		"#componentWithId": {
			height: "100%"
		}
	}
});

const App = () => {
	return (
		<Fragment>
			<CssBaseline />
			<Main />
		</Fragment>
	);
};

export default withStyles(styles)(App);