What technology to learn for "drawing" in the browser?

Question

Canvas

In order to learn JavaScript and php, I make various small applications. Now I'm making a browser game, at the moment it's a text game, I want to add a visual part.
So, the question arose of how best to display the 2D graphic part in the browser.
Now I'm trying plain HTML (Lots of divs and lots of lags.)
Thinking about Flash, Canvas (html5) , WebGL, ... ?
Reading the Internet is very confused, please understand a little.

Answer 1

Avoid Flash, it is not supported on most mobile devices.
html/html5/css