Compare HTML and HTML5 -

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i've been making research tools front end developer shall know. now, i'm focused on html , have questions listed below:

  1. since html5 better html , offers new tags such header, nav, article, etc. why not not using them?
  2. why there still old tags? or should prefer use html5 tags or keep using html tags?
  3. which opportunities html5 offers me @ all?
  4. does html5 supported of browsers?

do have comments, answers questions?

thanks in advance..

  1. not using them because not every legacy browser supports them. modern browsers do support html5 there still lots of folks on internet using old, outdated browsers. fortunately, html5 tags have fallback options in non-supported browsers load different tags depending on viewing them

  2. old tags still around because still crucial part of html structure. lots of websites rely on these "old" tags still function , taking them out break lot of websites. there nothing wrong "old" tags , depends on implementation , audience. think of html5 addition html family , not replacement

  3. html5 offers cool new tags such <canvas>, <video>, <audio>, , more bring html language more in-line modern times. check out more @ w3 here: http://www.w3schools.com/html/html5_intro.asp

  4. html5 supported modern browsers. can see list of them here: http://html5test.com/results/desktop.html


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