December 2009
Intermediate to advanced
190 pages
3h 55m
English
Content preview from HTML & XHTML Pocket Reference, 4th EditionBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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HTML5 Overview
HTML5, which aims to make HTML more useful for creating web applications as well as semantically marked up documents, is not yet a formal Recommendation as of this writing, however, it is beginning to gain browser support and is already being used for web and mobile application development.
HTML5 uses HTML 4.01 and the legacy behavior of browsers as a starting point, using the Document Object Model (DOM, the “tree” formed by a document’s structure) as its basis rather than a particular set of syntax rules. HTML5 can be written with HTML syntax (called the HTML serialization of HTML5) or according to the stricter syntax of XML (XML serialization, or “XHMTL 5”) if XML parsing is required.
Note
Because HTML5 is still in development, the details are changing rapidly. The HTML5 elements and attributes in this book are based on the WHATWG HTML5 Working Draft dated December 9, 2009.
For the most recent version, go to www.whatwg.org/specs/web-apps/current-work/multipage/. For a list of the ways HTML5 differs from HTML 4.01, see dev.w3.org/html5/html4-differences.
New in HTML5
HTML5 offers new features (elements, attributes, event handlers, and APIs) for easier web application development and more sophisticated form handling. There are also new semantic elements for marking up page content. Most of the purely presentational or poorly supported elements and attributes in HTML 4.01 have been dropped from HTML5, however, a few have been redefined or reinstated.
Elements
Details for each ...
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