Citation, Documentation of Sources

Q. Many online journals are switching from continuous pagination of their articles to assigning each article a number. I’m working with a company that wants to incorporate these article numbers in their citations. Where would the article number go in the citation?

A. The article number or ID usually follows the colon and, in a note, any page number, which is separated from the ID by a comma. Please see CMOS 14.71 for examples.

[This answer relies on the 18th edition of CMOS (2024) unless otherwise noted.]