Por que o NavLink no Router React sempre ativo
<li> <NavLink exact to='/' activeClassName="active-link">Home</NavLink> </li>
Thoughtless Termite
<li> <NavLink exact to='/' activeClassName="active-link">Home</NavLink> </li>
<li> <NavLink to='/' activeClassName="active-link" isActive={checkActive}>Home</NavLink> </li>