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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 ]
H5P is an abbreviation for HTML5 Package, and aims to make it easy for everyone to create, share and reuse interactive HTML5 content. [ 2 ] [ 3 ] Interactive videos, interactive presentations, quizzes, interactive timelines and more [ 4 ] have been developed and shared using H5P on H5P.org. H5P is being used by 17 000+ websites.
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.
The role attribute is used to define an element's role on a page. When sectioning elements were introduced, the role attribute became used less for landmarking. This is because roles were applied by default to most sectioning elements, therefore, they were more widely used and accepted for their simplicity.
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 ...
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If you are concerned about yourself or a loved one, call the Substance Abuse and Mental Health Services Administration's (SAMSA) confidential, free, 24-hour-a-day, 365-day-a-year helpline at 1-800 ...
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