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Improving Mobile Web Application Development with HTML5

Dec 28, 2011

📄 Contents

␡

Understanding How We Got to HTML5
Learning What's Different with HTML5
Defining Web Applications
Using the Open Web Standard
Using HTML5 with iOS and Android Devices
Writing Mobile Websites
Summary
Q&A
Workshop

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HTML5 Mobile Application Development in 24 Hours, Sams Teach Yourself

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Learning What’s Different with HTML5

HTML 4 is the last recommendation developed by the W3C alone. Most web pages right now are built in HTML 4 because it is widely supported by web browsers and editors.

XHTML was created by rewriting the HTML 4.01 specification as XML, which means that all tags must be closed, the XHTML tags must be written in all lowercase, all attributes must have quotation marks around them, and tags must be nested without overlapping.

Nesting Tags Correctly

When you nest two HTML tags, you should think of them as a stack of bowls—one inside the other. Always close the nested tag first, and then close the outer tag.

Incorrect:

This text is <em>italic, and this is <strong>bold and

italic</em></strong>

Correct:

This text is <em>italic, and this is <strong>bold and

italic</strong></em>

HTML5 goes back to a less restrictive version of HTML. End tags are no longer required for all elements, you can write in upper- or lowercase, and attributes don’t need to have quotations around them all the time.

HTML5 also adds a lot of new elements, including a streamlined doctype (or DTD—the first line of your HTML document. It tells the browser that this document is an HTML5 one), sectioning elements, many new form features, and support for drag and drop and other features useful for creating web applications.

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