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<body>
<canvas id="canvas" width="300" height="300"></canvas>
</body>
<script>
var ctx = document.getElementById('canvas').getContext('2d');
// Null and False both evaluate to zero
ctx.filter = new CanvasFilter({filter: "gaussianBlur", stdDeviation: 0});
ctx.fillRect(10, 10, 30, 30);
ctx.filter = new CanvasFilter({filter: "gaussianBlur", stdDeviation: 0});
ctx.fillRect(50, 10, 30, 30);
ctx.filter = new CanvasFilter({filter: "gaussianBlur", stdDeviation: 0});
ctx.fillRect(90, 10, 30, 30);
// True evaluates to one
ctx.filter = new CanvasFilter({filter: "gaussianBlur", stdDeviation: 1});
ctx.fillRect(130, 10, 30, 30);
// String, Number and Object should all work
ctx.filter = new CanvasFilter({filter: "gaussianBlur", stdDeviation: 5});
ctx.fillRect(10, 50, 30, 30);
ctx.filter = new CanvasFilter({filter: "gaussianBlur", stdDeviation: 5});
ctx.fillRect(50, 50, 30, 30);
ctx.filter = new CanvasFilter({filter: "gaussianBlur", stdDeviation: 5});
ctx.fillRect(90, 50, 30, 30);
// Valid sequence
ctx.filter = new CanvasFilter({filter: "gaussianBlur", stdDeviation: 5});
ctx.fillRect(130, 50, 30, 30);
</script>