Drupal 8.x

I'm searching a media browser for documents with a filetree like windows explorer. How can I do this?

I tried to migrate Rest services custom module, that processes POST requests, from drupal 7 to 8. 
But can't get POST to work, route not found error.

The GET is working, but POST give path error. I tried to follow the instruction given at below link
https://www.drupal.org/docs/8/api/restful-web-services-api/custom-rest-r...

<code>
/modules/custom/tax_tob/config/install/rest.resource.demo_resource.yml

I tried to migrate Rest services custom module, that processes POST requests, from drupal 8 to 9. The GET works by following instructions
But can't get POST to work, route not found error.

The GET is working, but POST give path error.

I follow the instruction given at below link but not fruitfull.
https://www.drupal.org/docs/8/api/restful-web-services-api/custom-rest-resources

Hi! Probably not super smart here 😅, but please how do I open a modal from a link and not a button?

This is the button code from https://getbootstrap.com/docs/4.0/components/modal/, but just want a text link to open the modal (not a button).

Example: <a href="...">open the modal</a>

I am working on module but every time when or what ever i change i have to flush cache by *drush cr*. Does is any settings available so i can avoid this drush cr process. By the way from backend cache is already disable

I am working on block and twig templates.