[1] [CITE@en[CSS Conditional Rules Module Level 3]]
( ([TIME[2012-12-12 23:06:24 +09:00]] 版))
<http://www.w3.org/TR/2012/WD-css3-conditional-20121213/>

[2] [CITE@en[DOMTokenList's supports() takes a single token · whatwg/dom@a97debc]]
([TIME[2016-01-02 11:19:23 +09:00]] 版)
<https://github.com/whatwg/dom/commit/a97debcb4da2c1fc0753ff6fb78638243b5731a3>