* 仕様書

[REFS[
- [2] [CITE@en[CSS Values and Units Module Level 4]], [TIME[2020-05-01 10:43:32 +09:00]] <https://drafts.csswg.org/css-values/#viewport-relative-lengths>
]REFS]

* 歴史

[1] [CITE@en[URL Bar Resizing  |  Web  |  Google Developers]]
([TIME[2017-01-19 00:59:23 +09:00]])
<https://developers.google.com/web/updates/2016/12/url-bar-resizing?utm_source=feed&utm_medium=feed&u>