HTML5日本語訳This Version: https://www.w3.org/TR/2018/SPSD-html5-20180327/ Latest Published Version: http://www.w3.org/TR/html5/ Latest Version of HTML: http://www.w3.org/TR/html/ Latest Editor's Draft of HTML: http://www.w3.org/html/wg/drafts/html/master/ Previous Version: http://www.w3.org/TR/2014/REC-html5-20141028/ Previous Recommendation: http://www.w3.org/TR/1999/REC-html401-19991224/ Editors: WHATWG: Ia
W3C CSS 検証サービス
The W3C Markup Validation Service
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