It’s a bit hacky but here’s a workaround.
var node="select your element";
var yourHeight="height of your fixed header";
// scroll to your element
node.scrollIntoView(true);
// now account for fixed header
var scrolledY = window.scrollY;
if(scrolledY){
window.scroll(0, scrolledY - yourHeight);
}
Edit:
A modern workaround is to use the CSS scroll-margin-top
property in combination with the :target
selector. Described in detail: https://www.bram.us/2020/03/01/prevent-content-from-being-hidden-underneath-a-fixed-header-by-using-scroll-margin-top/