Adding assets to CKEditor
Something new to Drupal 8 was the addition of a WYSIWYG. The preferred choice was CKEditor, which means that we no longer must install additional modules to provide our users with a better content editing experience.
The one drawback of using a WYSIWYG is that the styles in the editor and what the end user sees are sometime quite different. The reasoning is that the themes styling is not inherited by the WYSIWYG. We can now remedy this by adding additional metadata to our information
file by adding the following:
ckeditor_stylesheets
css/styles.css
https://fonts.googleapis.com/css?family=Open+Sans
The above metadata adds a reference to the theme's style sheet and also adds Google fonts to the editor. This helps to bridge the gap between the backend and frontend.