@salesforce/design-system-react/lib/components/toast/__examples__/error.jsx

Salesforce Lightning Design System for React

import React from 'react';
import Toast from '~/components/toast'; // `~` is replaced with design-system-react at runtime
import ToastContainer from '~/components/toast/container'; // `~` is replaced with design-system-react at runtime
import IconSettings from '~/components/icon-settings';

class Example extends React.Component {
	render() {
		return (
			<IconSettings iconPath="/assets/icons">
				<ToastContainer>
					<Toast
						labels={{
							heading:
								'Can’t save lead “Sally Wong” because another lead has the same name.',
						}}
						variant="error"
					/>
				</ToastContainer>
			</IconSettings>
		);
	}
}

Example.displayName = 'ToastExample';

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