In the "Introducing iPhone 6" example, there are two Canvas, and there will be problems on the mobile device

On the mobile device(Google Chrome).
When you slide up and down, the web will move up and down

How to prohibit?

There is probably a DOM (maybe the canvas?) that is larger then the visible area in the browser. My guess it is scrolling by the amount of the address? I recommend using remote debugging to debug the DOMs