How put percentage width into html canvas (no css)

Question

I have an image and have overlaid a canvas on top of it so that I can draw \'on\' the image without modifying the image itself.

Answer 1

You could resize the canvas to fit the width of the image in pixels via JavaScript. Since you're using a canvas you are probably using JavaScript already so this should not be a problem.

See Resize HTML5 canvas to fit window, although not identical, a similar solution should work.