У вашего броузера проблема в совместимости с HTML5
In this video we will learn how to create UIScrollView with Auto-layout. When we use auto-layout to make our App user interface design, we will stuck as there is a requirement to make a screen that is scrollable but it size is dynamic.
In auto-layout ScrollView Content size is not detectable by system or IOS as Auto-layout system detects the scroll content size by the height of the content inside the scrollview.
In this tutorial we learn how to make a scrollable UIScrollView while using auto-layout.
For written tutorial , you can visit
http://www.iostutorialjunction.com/2016/01/uiscrollview-with-autolayout-ios.html