typography - Widow/Orphan Control with JavaScript?

Question

It can be library-dependent or -agnostic. I just want to know if a script exists that will analyze the page (or maybe certain nodes that it has been given) and... "protect" against widows and orphans in the text.

What does "protect" mean? I don't know. I considered seeing if I could come up with one myself, but part of the problem is I'm not even sure how I would go about doing it.

Clarification: This would be for the screen version of the site, not print.

Answer 1

I recently ran into this problem in my angular app and used some regex I found on this post to add a non-breaking space before the last word:

String.replace(/s([^s<]+)s*$/,'&nbsp;$1');

But angular was printing the non-breaking space as a string so I used unicode and it worked great:
String.replace(/s([^s<]+)s*$/,'u00A0$1');