Sets whether the site in the background behind a lightbox can be scrolled while a lightbox overlay is open.
If backgroundScrollEnabled is true, site visitors can scroll the site in the background behind a lightbox while a lightbox overlay is open.
If backgroundScrollEnabled is false, site visitors can't scroll the site in the background behind a lightbox while a lightbox overlay is open.
The default for backgroundScrollEnabled is false.
Note: This method only affects the site in the background behind a lightbox. It doesn't affect the scrollability of the lightbox content itself.
Whether site visitors can scroll the site in the background behind a lightbox while a lightbox overlay is open.
Default: false