Can use both client and server side scripts?

Answer 1

HTML5 as a server side language, which is not a server side language but a powerful markup language. But, client side markup/scripting languages (HTML5, JQuery, Ajax etc) have come a long way that you could now do SOME of the tasks you'd do at server side at client side. But, with the use of some external libraries (They could be open source or commercial). The main disadvantage is your dependency to these libraries.

Answer 2

If your question was can u use HTML5 as server or client script. Yes is ur answer since HTML is a markup script