I have a question: can I crop canvas in percentage with javascript? Let's say I have an image of 500 by 500 pixels where in any of its area a circle of 100 by 100 pixels is displayed. Let's say such an image is cropped to a triangle because I set it that way in the code. But if I upload the same full image but smaller, 100 by 100 pixels, then there will be no triangle. So I need the crop in percentage.