Hiding the address bar on iPhone/Android?

Question: I'm having trouble hiding the address bar on mobiles. I'm using snap.js with a fixed header at the top. Everything works fine, but I can't hide the address bar with:

setTimeout(function(){
window.scrollTo(0, 1);
}, 0);

Is this because of snap.js? Is there a solution?

Start by reproducing the issue on iPhone and Android with snap.js, a fixed header, and the shown window.scrollTo(0, 1) call. Inspect how the library handles scrolling and determine whether it affects the address bar; done means providing a confirmed explanation and solution or workaround.

Written by the indexing model from the issue text.