Shadows

To create a generic shadow, use the shadowColor and shadowBlur properties:

$('canvas').drawArc({
fillStyle: '#58d',
shadowColor: '#000',
shadowBlur: 10,
x: 50, y: 50,
radius: 30
});

Offset Position

The shadow can be offset relative to itself using the shadowX and shadowY properties:

$('canvas').drawArc({
fillStyle: '#58d',
strokeStyle: '#8e3',
strokeWidth: 4,
shadowColor: '#000',
shadowBlur: 5,
shadowX: -5,
shadowY: 5,
x: 50, y: 50,
radius: 30
});

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