This package add a collection of HTML5 canvas snippets for you Atom text editor
Atom > Preferences... then search for Canvas snippets in Packages tab.
Example: -> to be updated soon...
context.fillRect(0, 0, 400, 230);
ctx.quadraticCurveTo(cp1x, cp1y, x, y);
Most of snippets here are writtern originally by John hunter for textmate.
Good catch. Let us know what about this package looks wrong to you, and we'll investigate right away.