How to make a JavaScript code which failed to run one webpage to run anyway on any other webpage?

[rpg_digital]

There appears to be some overlap here with a more recent thread from you

CSS works in console but not from a CSS file

I have a Drupal website in which I edit some webpages with the Drupal Layout Builder tool. The Drupal Layout Builder tool contains a frontend-loaded popup. This popup is a bit narrow for me so I want to broaden it a bit. This CSS works in console: #drupal-off-canvas-wrapper { width: 600px !important; /* Two times the native 300px */ } My problem is that this CSS does not work from the website’s main CSS file (other CSS directives in that file do work so it’s not a problem of miscommunica…

So as to avoid confusion, I am going to be closing this thread.