Working with the CSSstyleSheet API
- Changing the selectorText -

Continuing story in the exchange of views in the topic, especially about the CodePen 'Changing the SelectorText'.
The test pages are stand-alone, so the CodePen machine can not influence the results.
Tested are Firefox, Chrome, Opera and IE-11 on desktop under Windows-7.

The CodePen results

But first: the results when the CodePen is used directly on the CodePen site.

It seems CodePen is applying the javascript again (of his own accord) after a change in the HTMl or CSS panel.