Theme development

I need a field to get a page url or a file, template loops this field content and if contains file will show Download button else shows View button, so in dashboard if user uploads any file, template ignores the text field

currently I used default drupal media file contains description, so if description field filled it ignores file rendering but the problem is that user must upload a file to access description field means at least must upload a file on server

How we can have a field with both inputs?

Hello,

I tried to use my custom module contains AJAX behavior and also using Webform module that works as dialog. both of them working locally but on the host i get console error as below and both of this module navigate to the module relevant path instead open up as dialog

I created a module contains form which should work as a part of template or as a modal and it works for these purposes

test_form.open_test_form:
  path: 'test-form'
  defaults:
    _title: 'Test Form'
    _controller: '\Drupal\test_form\Controller\TestFormController::openTestForm'
  requirements:
    _permission: 'access content'

but if i load form path directly loacalhost/test-form will get below response as a textarea

I made page view and added Content: Translation language (= Interface text language selected for page) and Rendering Language: Interface text language selected for page and needed override default  views-view-unformatted-list template so in my template have

unfortunately to have different header banner for each page made by view we have to use additional elements like blocks as header, so first i created content type for my page, and collect them by view page, then created a custom block for banner image and add it as header.

the first weird thing is admin has to create and modify contents and banner image in different area!!! i have no idea about this concept

the main question is how can i access the field value of custom block put inside header of this view?