问题
I created an animated HTML5 canvas that uses bezier curves to draw a filled pattern.
I have been testing it in Chrome for Mac. I only seem to see this on Safari for Mac.
For some reason, I see little artifacts left behind by the figures (see below that is moving to the left and the artifacts go off to the right).
I trigger a redraw by changing the width of the canvas to its current width, if that helps...
Also, if I mouse over the canvas or change windows the artifacts go away. Since I think it decides to redraw the whole thing over.
Does anyone know why this would be happening?
来源：https://stackoverflow.com/questions/4998857/canvas-draws-artifacts-in-safari-for-animated-filled-bezier-curves