HTML 5 canvas chart plug-in

When we use highchart, we find that it uses svg to draw images. What should we do with canvas. In the past, when I used the AS chart plug-in, I used the Graphics object of the container to draw the image. The context of the canvas is the same AS that of Graphics. Then I tried to use canvas to do something like this. The specific implementation is as follows. If your personal expression skills are incorrect, check the source code as follows: copy the Code <! DOCTYPE html>