@salesforce/design-system-react/lib/components/popover/__examples__/header.jsx

Salesforce Lightning Design System for React

import React from 'react';

import IconSettings from '~/components/icon-settings';
import Popover from '~/components/popover'; // `~` is replaced with design-system-react at runtime
import Button from '~/components/button';

class Example extends React.Component {
	static displayName = 'PopoverExample';

	render() {
		return (
			<IconSettings iconPath="/assets/icons">
				<div>
					<Popover
						body="Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua."
						heading="Header Title"
						id="popover-heading"
					>
						<Button label="Trigger Popover" />
					</Popover>
				</div>
			</IconSettings>
		);
	}
}

export default Example; // export is replaced with `ReactDOM.render(<Example />, mountNode);` at runtime