The oxy_replace() Function

The oxy_replace function is used to replace a string of text.

The oxy_replace() function has two signatures:

If you have image references but you want to see in the visual Author editing mode thumbnail images which reside in the same folder:
image[href]{
 content:oxy_url(oxy_base-uri(), oxy_replace(attr(href), '.jpeg', 'Thumbnail.jpeg'));
}