clearing circular regions from HTML5 Canvas

Question

It appears the only way to clear a region from a canvas is to use the clearRect() command - I need to clear a circle (I am masking out areas from a filled canvas, point ligh

Answer 1

Use canvas.getContext("2d").arc(...) to draw a circle over the area with the background colour?

var canvas = document.getElementById("myCanvas");
var context = canvas.getContext("2d");
context.arc(x, y, r, 0, 2*Math.PI, false);
context.fillStyle = "#FFFFFF";
context.fill();