Theme development

How do I transfer files form a subdomain (drupal 9.1)to a domain in drupal 9.1

I created a subdomain that would a theme (dark news) that I would like to make my domain. 

Hello everyone,

I installed bootstrap4 theme and I created a subtheme using bootstrap4 appearance configuration menu.

When I activate bootstrap4 theme, I have a visible header and footer background color.
When I activate my bootstrap4 sub-theme, my header and footer background color is not visible.

However, when I compare style.css, style.css.map, style-4-5.css and style-4-5.css.map for both themes, they are identical.

Where does the difference come from ?

Hello!
I am making a theme for Drupal 8 || 9
I need to remove the link to the current page. Replace the tag <a> with the <span> tag, if the link has the "is-active" class

For drupal 7 I wrote this code:

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