New features:
HTML5 is now not a subset of SGML, mainly about image, location, storage, multi-tasking and other functions.
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 control, calendar, date, time, email, url, search
9) New technology Webworker, WebSocket, geolocation
Elements to remove:
1) Pure expression of the elements: Basefont,big,center,font, s,strike,tt,u;
2) elements that have a negative impact on usability: frame,frameset,noframes;
Support for 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 HTML5SHIV framework is the most used):
1 <!--[if23
how to differentiate:
DOCTYPE declaration of new structural elements, functional elements
New features of HTML5 and browser compatibility issues with new tags