Ionic 4 & Angular 8

I am facing an issue after updating to angular 8.

Here is the thing. I have two apps that are the same except for the theme, so I’m using a theme setup that can change based on which application is on my storage. Here is the function that loads the CSS. the app enters on it, but apparently it wont execute the line:

fileSCSS(name) {
    require(`style-loader!../theme/${name}.scss`);
  }

Perhaps something to do with require? Any help is appreciated.