What are the new features and elements removed from HTML5? How do I handle browser compatibility issues with HTML5 new tags? How do I differentiate between HTML and HTML5?

New features:

1. Drag release (Drag and Drop) API

2. Semantically Better content tags (header,nav,footer,aside,article,section)

3. Audio, Video API (Audio,video)

4. Canvas API

5. Geography (geolocation) API

6. Local offline storage Localstorage long-term storage data, the browser is closed after the data is not lost;

7. Sessionstorage data is automatically deleted after the browser is closed

8. Form controls, calendar, date, time, email, url, search

9. New technology Webworker, WebSocket, geolocation

Elements to remove:

1. Elements of pure expression: Basefont,big,center,font, s,strike,tt,u;

2. Elements that have a negative impact on usability: frame,frameset,noframes;

Support HTML5 New Tags:

1. IE8/IE7/IE6 supports the label generated by the Document.createelement method, which allows these browsers to support HTML5 new tags, and after the browser supports new tags, You also need to add the default style of the label (the best way is to use the mature framework directly, the Html5shim framework is the most used):

<!--[if LT IE 9]><script> src= "Http://html5shim.googlecode.com/svn/trunk/html5.js" </script><! [endif]-->

　　

How to differentiate:

DOCTYPE declaration of new structural elements, functional elements

What are the new features and elements removed from HTML5? How do I handle browser compatibility issues with HTML5 new tags? How do I differentiate between HTML and HTML5?