[1] [CITE@en["object getStartDate()" should be "Date getStartDate()" · Issue #3340 · whatwg/html]]
([TIME[2018-01-17 15:56:34 +09:00]])
<https://github.com/whatwg/html/issues/3340>

[2] [CITE@en[312699 - Support 'getStartDate()' method in the media element. - chromium - Monorail]]
([TIME[2018-01-17 15:57:23 +09:00]])
<https://bugs.chromium.org/p/chromium/issues/detail?id=312699>