Stop Canvas Scroll

I have following problem in my game developed with Cocos Creator,
on iOS and Safari browser.

I can put my finger bottom of the web-page and drag the canvas up. When I do this scrollbars appear on the web-page.

I can drag the canvas out of the view also.

I think there is a boarder gap between canvas and web page that allowed to do this.

Is there a way to prevent this?