when to use canvas html5 code example

Example 1: html5 canvas

I made a library for thr HTML5 canvas.
https://jsfiddle.net/Catking/g0z6o1fb/

Example 2: html css canvas

<canvas id="myCanvas" width="200" height="100" style="border:1px solid #000000;">
</canvas>

Example 3: html5 canvas

<canvas id="" width="" height=""></canvas>
<script>
	
</script>