Zooming entire canvas

Is it possible zoom entire canvas instead of zooming inside elements in canvas gojs
like the fallowing canvas
In this link canvas is zooming and panning is it possible to implements that functionality using gojs
please help me

First, to be clear, GoJS Diagrams by default support zooming and panning using either the mouse or fingers.

I think you are asking how to prevent control-mouse-wheel and pinch zooming from changing the scale of the diagram, and instead allow those gestures to change the scale of the whole page. I believe the easiest way would be to set Diagram.allowZoom to false.