W3c html reference pdf
There are no restrictions on allowed values, and the browser will automatically detect the correct file extension and add it to the file (. img, . pdf, . txt, . html, etc. ).Differences Between HTML 4. 01 and HTML5. Some HTML 4. 01 attributes are not supported in HTML5. The form attribute is new in HTML5. In HTML5, objects can be used and submitted in forms. w3c html reference pdf
Drag and Drop, Web Workers A focus on common user interface conventions such as drag and drop as well as threaded processing of data behind the scenes with Web Workers make it easy to build common web apps like realtime chat into your site.