Drupal 8.x

I installed Superfish version 8.x-1.4 in order to have megamenus. The site is currently running Bartik with no theme adjustments. The JS works great and there are a tons of settings. However, my menus look like this:

I don't like the down triangle (indicated that the menu item is expandable) superimposed on the text. I want it to appear after the text.

Hi drupal newbie here, can i get suggestion on how I can integrate this to our website : https://ibb.co/TPNS5P8

I search to use a hook to get all HTML content to replace certain occurrences on code.

I want use `DOMDocument()` to modify some elements.

My actual hook but I can't get all page HTML...

Hello, how to create custom contact form "ask about this product", and when email comes, it shows that url, from wich it was sent?

Thank you

After Installation, CKEditor was working.  I went to edit something on the site today and now I just get the HTML Code for the page.  I've tried different browsers.

I check the java console and it says:

Uncaught ReferenceError: Drupal is not defined
    at js_bqN6dsbO3BfoA2sn1B_GjPsFLgCg5E1OJZ0FM1VcXNc.js:211

Clicking on the function takes you to: