ReactDOM.render(
  <Provider store={store}>
    <Router history={history}>
      <Route component={Layout}>
        <Route path='/' component={Phones}/>
        <Route path='/categories/:id' component={Phones}/>
      </Route>
      <Route path='/phones/:id' component={Phone}/>
    </Router>
  </Provider>,
  document.getElementById('root')
);const Categories = ({categories, activeCategoryId}) => {
  const renderCategory = (category, index) => {
    const getActiveState = R.propEq('id', activeCategoryId)
    const linkClass = classNames({
      'list-group-item': true,
      'active': getActiveState(category)
    })
    return (
      <Link
        to={`/categories/${category.id}`}
        className={linkClass}
        key={index}
      >
        {category.name}
      </Link>
    )
  }
  const renderAllCategory = () => {
    const linkClass = classNames({
      'list-group-item': true,
      'active': R.isNil(activeCategoryId)
    })
    return (
      <Link
        to='/'
        className={linkClass}
      >
        All
      </Link>
    )
  }
  return (
    <div className='well'>
      <h4>Brand</h4>
      <div className='list-group'>
        {renderAllCategory()}
        {categories.map((category, index) => renderCategory(category, index))}
      </div>
    </div>
  )
}
const mapStateToProps = (state, ownProps) => ({
  categories: getCategories(state),
  activeCategoryId: getActiveCategoryId(ownProps)
})
export default compose(
  withRouter,
  connect(mapStateToProps, null)
)(Categories)const Content = match => {
	console.log(match);
	return (
		<div className="content">
			<Route component={Home} path="/" />
			<Route component={NewsPage} path="/news" />
		</div>
	);
};
const Header = () => (
	<div className="header">
			<div className="registration-box">
				<Link className="btn sign-in" to="/sign-in">
					Sign in
				</Link>
			</div>
		</div>
		<div className="nav">
			<nav className="main-nav">
				<NavLink activeClassName="active" exact to="/">
					Главная
				</NavLink>
				<NavLink to="/news">Новости</NavLink>
			</nav>
		</div>
	</div>
);
const App = () => (
	<MainLayout>
		<Header />
		<Content />
	</MainLayout>
);
const MainLayout = ({children}) => {
	console.log(children);
	return <div className="wrapper-app">{children}</div>;
};
ReactDOM.render(
	<Router>
		<div className="">
			<Route component={App} path="/" />
			<Route component={SignIn} path="/sign-in" />
		</div>
	</Router>,
	document.querySelector('.root'),
);ReactDOM.render(
	<Router>
		<div className="">
			<Switch>
				<Route component={App} path="/" />
				<Route component={SignIn} path="/sign-in" />
			</Switch>
		</div>
	</Router>,
	document.querySelector('.root'),
);ReactDOM.render(
	<Router>
		<div className="">
			<Switch>
				<Route component={App} exact path="/" />
				<Route component={SignIn} exact path="/sign-in" />
			</Switch>
		</div>
	</Router>,
	document.querySelector('.root'),
);saveNewTrackName() {
	const props = this.props;
	const track = this.state.track;
	props.onChangeTrack(track);
}}else if (action.type === 'CHANGE_TRACK'){
	const newState = state.filter(obj => obj.id !== action.track.id);
	return [
		...newState,
		action.track,
	];
}import {combineReducers}from 'redux';
import tracks from './tracks';
import playlists from './playlist';
import filterTracks from './filterTracks';
export default combineReducers({
	tracks,
	playlists,
	filterTracks,
});const initialState = [];
export default function playList(state = initialState, action){
	if (action.type === 'ADD_TRACK'){
		// console.log('add_track');
		return [
			...state,
			action.payload,
		];
	}else if (action.type === 'DELETE_TRACK'){
		return state.filter(obj => obj.id !== action.payload);
	}else if (action.type === 'CANGE_TRACK'){
		return state;
	}
	return state;
}<?php
/**
 * Template Name: Продуктовая страница
 */
get_header(); ?>
<h1>заголовок</h1>
<p><?php the_field('scr_text_8'); ?></p>
<?php get_footer();<?php
			while ( have_posts() ) : the_post();
				get_template_part( 'template-parts/page/content', 'page' );
				
				if ( comments_open() || get_comments_number() ) :
					comments_template();
				endif;
			endwhile; // End of the loop.
			?>
в ownProps пришел объект и содержащий этот id после того как он нажимал на Link в этом же компоненте.
Попробую воспользоваться NavLink, думаю это то, что мне нужно для подсветки активного пункта категории.