08-16-2017, 10:22 PM
Advanced HTML
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INTRODUCTION
The web is constantly evolving. New and innovative websites are being created every day, pushing the boundaries of HTML in every direction. HTML 4 has been around for nearly a decade now, and publishers seeking new techniques to provide enhanced functionality are being held back by the constraints of the language and browsers. To give authors more flexibility and interoperability, and enable more interactive and exciting websites and applications, HTML 5 introduces and enhances a wide range of features including form controls, APIs, multimedia, structure, and semantics.
STRUCTURE
HTML 5 introduces a whole set of new elements that make it much easier to structure pages. Most HTML 4 pages include a variety of common structures, such as headers, footers and columns and today, it is fairly common to mark them up using div elements, giving each a descriptive id or class.
WEB WORKERS
We can think of it as Hyper-Threading for web browsers. Separate background threads are used to do processing without effecting the performance of a webpage. This can be very useful for web applications which rely on heavy scripts to perform functions (among other things). Firefox 3.5b has the best implementation of these proposed features. Opera and Safari also supports some elements of this feature. Basically, Web Workers offers you a possibility to load a JavaScript file dynamically and then have it process code in a background process, not affecting the user interface and its response level.