BadFormatting.js

import React from 'react';

class BadFormatting extends React.Component {

    handleClick() {
        console.log('clicked');
    }

    render() {
        return (
            <div>
                <div>
                    <div>
                        <div>
                            <div onClick={ ::this.handleClick }>
                            </div>
                        </div>
                    </div>
                </div>
            </div>
        );
    }
}

export default BadFormatting;