If I modify JavaScript/CSS in WordPress themes/plugins (GPL licensed) for my website, do I have to include all of the changes in the header of the file? I know that use css/js files in a website is a distribute operation for opensource license.

up vote 3 down vote accepted

No. The GPL requires a notice that you changed a file, but the notice doesn't have to include what changes were made.

If your changes were large and/or creative enough to be protected by copyright (and the bar is not very high on that), it would technically be enough notice to add a copyright statement to the files for your copyright.

For people looking at your adapted version, it would be nice if you give a one or two line description of your changes, but you don't have to be complete.

  • Many thanks Bart, now it's more clear. – Orso Nero Jul 10 at 21:17
  • If you want to record changes (not needed by licence), then use a revision control system (svn, hg, git). – ctrl-alt-delor Jul 13 at 15:16

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