Help scroll view position app WEB

Hello friends, how are you? I came here to this group to ask for help, I have a project in Appgyver that is divided into three containers: the first is the header, the second is one with a search field and the third is one with a scroll view. My question is the following, how do I hide the header container when I scroll the scroll view by X pixels? For example, when I scroll the scroll view by 200px the header container changes the view to false.

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