HTML5 progress bar

We often say that the HTML5 technology, that is, web front-end development technology. Web front end development technology mainly includes: HTML5, CSS3, JavaScript. Among them, HTML5 test is a hypertext language, is the latest version of the world wide web core language, structure layer corresponding to the front end of web; CSS3 is the latest version of CSS technology, behavior layer corresponding to the front end of web; JavaScript is an interpreted scripting language, the framework technology appear constantly inject vitality into HTML5 progress bar technology, performance the front layer corresponds to web; therefore, Zhengzhou wants to participate in the web front-end development training, become a good front-end engineer must be proficient in these three elements.http://www.html5website.com/about-the-problem-of-video-audio-tags-and-progress-bar-in-html5/