const MenuLink = ({ label, to , activeOnlyWhenExact }) => {
    return (
        <Route path={ to } exact={ activeOnlyWhenExact } children={({ match })=>{
            var active = match ? 'active' : '';
            return (
                <li className={`default-class ${active} `}>
                    <Link to={ to }>
                        { label } 
                    </Link>
                </li>
            )
        }} />
    )
}

using:

<MenuLink label="Home" to="/" activeOnlyWhenExact={ true }/>