[1] [CITE@en[CSS Property 'offset' is IDL attribute 'cssOffset']]
([[ericwilligers]]著, [TIME[2017-03-10 13:14:31 +09:00]])
<https://github.com/w3c/web-animations/commit/b0c713ebb2ab87bebeee6de694dfd8cf86e34a3e>