visualviewport

gistfile1.txt

{

if(window.__vvviewer) window.__vvviewer.remove();
window.__vvviewer = document.createElement("div");
__vvviewer.setAttribute("style", "position:fixed;left:0;right:0;width:100%;background-color:red;height:4px;z-index:1000000");
document.body.appendChild(__vvviewer);

function update() {

__vvviewer.style.top = visualViewport.offsetTop + "px";
//__vvviewer.style.transform = "scaleY("+(1 / visualViewport.scale)+")"
    
}


visualViewport.onresize = () => {
    update();
};
visualViewport.onscroll = () => {
    update();
};
update();
}