The extension will not be further developed for the coming TYPO3 versions. The effort is too great and it is not the job of a content management system to take care of styles.

It has been deactivated in the website.

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Problem:
An editor should use only certain names to describe a dress. In the next season he should use other colors. This poses the problem that TYPO3 should transfer real strings instead of numbers. Maybe the colors should be printed elsewhere as icons or color values.
Non-numerical inefficiencies have the advantage over numbers that they can be read later on and even understood.
'borderstyle':
Instead of colors, the extension 'borderstyle' uses class names for the framing of content elements. The editor defines the class title, the class name and the parameters the CSS definition of the frames. TYPO3 generates a dynamic CSS file from this. The editor also assigns the class titles to selected content elements. TYPO3 enters the class name for the corresponding template, so that the browser ultimately displays what was defined dynamically.
Annotation:
The class names can be made unique by prefix, so that you could select several classes together if the TCA would allow it._{[tranlated with goolge-help]}

_{[tranlated with goolge-help]}One paradigm of website programming is that CSS must be static. But what happens when someone wants to make their CSS dynamic, for example because he wants to decorate his page differently at different times. After all, you finally go to the wedding and keep your work clothes on.

Of course, the website operator could switch between different CSS files. The extension borderstyle tries a cooler version. The CSS can be maintained by the editor via the backend. TYPO3 then generates the CSS file dynamically and integrates it into its website. _{[tranlated with goolge-help]}