Can i know how can i use 'id','div' and 'canvas'

Question

that's it

Answer 1

<div id="div" width="100" height="100">

id's are used to give a unique name to an element allowing you to edit them with CSS/JS easier.

As for canvas you have to learn alone… (although i have some example codes on my profile...)

Answer 2

With as terse as @ValentinHacker, you could describe use of canvas as well:

<canvas id="mycanvasname" width="100" height="100">

:P

Obviously, more complete answer beyond the scope of this Q&A thread... courses and tutorials provide this kind of help ^^

That's all, folks ! ;)

Answer 3

Notice that attributes in html tag elements are deprecated, and is recommended to use css rules instead...