* 仕様書

[REFS[
- [2] [CITE@en[Selectors Level 3]] ([TIME[2011-09-29 22:16:17 +09:00]] 版) <http://www.w3.org/TR/selectors/#gen-content>
]REFS]

* 歴史

** CSS2

[REFS[
- [1] [CITE@en[Selectors]] ([TIME[2011-06-07 22:09:52 +09:00]] 版) <http://www.w3.org/TR/CSS2/selector.html#before-and-after>
]REFS]

[3] [CITE@en[CSS3 Generated and Replaced Content Module]]
( ([TIME[2003-05-15 21:54:58 +09:00]] 版))
<http://www.w3.org/TR/2003/WD-css3-content-20030514/#inserting>

[4] [CITE@en[CSS Generated Content Module Level 3]]
( ([TIME[2011-04-21 02:28:30 +09:00]] 版))
<http://dev.w3.org/csswg/css3-content/#inserting-content-into-an-element-the-be>

[5] [CITE@en[Selectors]]
( ([TIME[2001-01-16 00:22:58 +09:00]] 版))
<http://www.w3.org/TR/1998/WD-css2-19980128/selector.html#didx-pseudo-elements-3>

[6] [CITE[Issue 255482 - chromium - DOM4: prepend, append, before, after & replace - An open-source project to help move the web forward. - Google Project Hosting]]
( ([TIME[2014-11-26 12:42:38 +09:00]] 版))
<https://code.google.com/p/chromium/issues/detail?id=255482>

[7] [CITE@en[911477 – Implement DOM4 methods: prepend(), append(), before(), after() and replace()]]
( ([TIME[2014-11-26 12:43:29 +09:00]] 版))
<https://bugzilla.mozilla.org/show_bug.cgi?id=911477>

[8] [CITE@en[Mark new APIs as ''''''[''''''Unscopeable'''''']'''''' https://www.w3.org/Bugs/Public/show_bug.c... · b2eb25f · whatwg/dom]]
( ([TIME[2014-11-27 20:47:47 +09:00]] 版))
<https://github.com/whatwg/dom/commit/b2eb25f751cb71a6ffacebe714c27667d3591e6b>

[9] [CITE@en[Define node document for new Text nodes · whatwg/dom@36ef32e]]
([TIME[2016-04-17 14:04:59 +09:00]] 版)
<https://github.com/whatwg/dom/commit/36ef32ebc6c8318c1da27c2e9fa178398ff401f6>

[10] [CITE@en[Editorial: flip non-null/otherwise conditions · whatwg/dom@8d281a3]]
([TIME[2016-04-22 18:21:32 +09:00]] 版)
<https://github.com/whatwg/dom/commit/8d281a354690abfda5ff558c461747f304f11788>

[11] [CITE@en[Add ''''''[''''''CEReactions'''''']'''''' annotations to mutating methods · whatwg/dom@3cd02d1]]
([TIME[2016-04-26 19:06:21 +09:00]] 版)
<https://github.com/whatwg/dom/commit/3cd02d139c159a31fbb400e03932652c72fc7812>