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HTML5 is designed so that old browsers can safely ignore new HTML5 constructs. [8] In contrast to HTML 4.01, the HTML5 specification gives detailed rules for lexing and parsing , with the intent that compliant browsers will produce the same results when parsing incorrect syntax. [ 126 ]
It was the first version developed and standardized exclusively by the W3C, as the IETF had closed its HTML Working Group on September 12, 1996. [ 17 ] Initially code-named "Wilbur", [ 18 ] HTML 3.2 dropped math formulas entirely, reconciled overlap among various proprietary extensions and adopted most of Netscape 's visual markup tags.
HTML5 was published in October 2014. Part of HTML5 had replaced DOM Level 2 HTML module. DOM Level 4 was published in 2015 and retired in November 2020. [9] DOM 2020-06 was published in September 2021 as a W3C Recommendation. [10] It is a snapshot of the WHATWG living standard.
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W3C briefly switched to WHATWG's definition in the draft stages of HTML5, but switched back to their own definition in 2012 after protest from the Web developer community. This difference subsequently disappeared when the W3C's version was subsumed into the WHATWG's version in the late 2010s and now the WHATWG's version is the only version in ...
HTML5 standard HTML web browser features Adobe Flash/AIR features Date started Work began in 2003 Working Draft as of 2011 [3] — Work began in 1996 Version 1 released in 1997 Desktop operating systems — AmigaOS, MorphOS, Apple macOS, Linux, Microsoft Windows: Apple macOS, Linux, Microsoft Windows: Mobile operating systems — * Android 2.3 ...
On August 18, 2015, Microsoft released the first preview to EdgeHTML platform version 13 as part of Windows 10.0.10525, though it was still labeled as version 12. In subsequent updates, the support for HTML5 and CSS3 was extended to include new elements. EdgeHTML 13.10586 was released in multiple versions of Windows.
XHTML 1.0 Transitional is the XML equivalent of HTML 4.01 Transitional, and includes the presentational elements (such as center, font and strike) excluded from the strict version. XHTML 1.0 Frameset is the XML equivalent of HTML 4.01 Frameset, and allows for the definition of frameset documents —a common Web feature in the late 1990s.