<canvas id="tacos"></canvas>
"Added in HTML5,the HTML <canvas> element can be used to draw graphics via scripting in JavaScript. For example, it can be used to draw graphs, make photo compositions, create animations, or even do real-time video processing or rendering." - Mozilla Developer Network
Basically, SVG is awesome because it is easier to manipulate. Canvas is awesome because it generally performs better when animating a large number of objects. Also, WebGL.
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Use canvas for your bat-shit crazy animations combined with SVG for UI elements.
GO CRAZY!
Lets go to the code pens.