The development history of HTML and the birth of HTML5 HTML 5 are the greatest strides in Web development standards over the past decade. Unlike previous versions, HTML 5 is not only used to express Web content. Its new mission is to bring Web into a mature application platform. On the HTML 5 platform, video, audio, images, animations, and interactions with computers are standardized. (HTML5 also has its own logo) reasons for choosing HTML5 and reasons for new features: 1. compatibility, the old version of the browser can also run (not very reliable) 2. practicality, simplified tags, subdivided functions, and added mobile Internet elements 3. Revolutionary. HTML is no longer a simple tag language, and features such as API and rendering are added: 1. support for micro-data and micro-formats; 2. local Storage, offline applications 3. API call, MAP, location, LBS, etc. 4. connection communication, background thread, 5. multimedia, 6. 3D, graphics and special effects, 7. what other knowledge does CSS3 need to learn about HTML5? • Basic HTML knowledge, • CSS style knowledge, and • javascript knowledge (JQ is better)