Can I put background also canvas?

Question

Canvas background in body

Answer 1

(please clarify if my guess is wrong)

I think you mean "have the canvas behind other elements / the DOM, as if it were the background"*

If I were researching this, I would look at ways to remove the canvas element from the "document flow", so that it did not interact with anything else in the DOM.
I believe this is usually done with the CSS attribute 'position' (absolute, relative), and I would also at least review the attributes 'float' (for a containing <div>) and 'z-index'.

* If you mean 'canvas has a separate background and foreground' ... a canvas has 1 layer / draw space (use buffers and draw regions)

Answer 2

You meant to write canvas and background in body?
if so "yes"

Answer 3

why not?

Answer 4

How?

Answer 5

in the example below there is a video in the background: you can easily use the same approach for your canvas (see the css for the z index)

https://code.sololearn.com/WrBG0rrlpUN9/?ref=app