Tell me how to access pathname?
Parameter this.props is empty and this.props.location is undefined.
How to automatically get this parameter without having to set it yourself?
Most of the solutions found require me to set this parameter myself (manually), which is not very convenient and complicates the code.
ReactDOM.render(
    <BrowserRouter>
      <React.StrictMode>
        <App />
      </React.StrictMode>
    </BrowserRouter>
  document.getElementById('root')
);
function App() {
  return (
    <Container>
      <Row><GeneralMenu /></Row>
      <Row>
        <Switch>
          <Route exact path="/block1">
            <PageStrategy />
          </Route>
          <Route exact path="/block2">
            <PageStrategy />
          </Route>
        </Switch>
      </Row>
    </Container>
  );
}
class GeneralMenu  extends Component {
    render() {
// {location} = this.props.location.pathname;
      return (
  <Navbar>
    <Nav activeKey = {this.props.location.pathname}>
      <Nav.Link href = "/block1">Block1</Nav.Link>
      <Nav.Link href = "/block2">Block2</Nav.Link>
    </Nav>
  </Navbar>
        );      
    }
}
 
    