Placing a <div> within a <canvas>

I take a div within a canvas element like following:

<canvas>
    <div></div>
</canvas>

Here both of them has height and width. But here I can't see the div!

Is it not possible to take a div or p within a canvas?

You cannot place elements inside a canvas (and have both displayed); they are only displayed if the browser does not understand the canvas element.

If you would like to position elements over the same area as a canvas, here is one technique (among many) that would let you do it:

HTML

<div id="canvas-wrap">
  <canvas width="800" height="600"></canvas>
  <div id="overlay"></div>
</div>

CSS

#canvas-wrap { position:relative } /* Make this a positioned parent */
#overlay     { position:absolute; top:20px; left:30px; }

Here's another technique, which lets the content of the div flow normally and makes the canvas a background to the content:

CSS

#canvas-wrap { position:relative; width:800px; height:600px }
#canvas-wrap canvas { position:absolute; top:0; left:0; z-index:0 }