Read a query parameter from a route

Implement DidEnterObserver in your view and call event.getLocation().getQueryParameters() to get a ParametersBag. Use .get() for a single value or .getList() for multi-value parameters.

import com.webforj.component.Composite;
import com.webforj.component.html.elements.Div;
import com.webforj.router.annotation.Route;
import com.webforj.router.event.DidEnterEvent;
import com.webforj.router.observer.DidEnterObserver;
import com.webforj.router.history.ParametersBag;

@Route(value = "catalog")
public class ProductView extends Composite<Div> implements DidEnterObserver {

  @Override
  public void onDidEnter(DidEnterEvent event, ParametersBag parameters) {
    ParametersBag query = event.getLocation().getQueryParameters();

    String category = query.get("category").orElse("all");
    String sort = query.get("sort").orElse("default");
  }
}

For comma-delimited values such as ?tag=css,routing, use query.getList("tag").orElse(List.of()).