Replace fragment jumper with CSS-based solution (scroll-margin-top)
CSS now supports the functionality that is being patched in by the fragment jumper script. That functionality is to scroll the viewport past the fixed navbar so that target element of a URL fragment becomes visible.
See https://developer.mozilla.org/en-US/docs/Web/CSS/scroll-padding-top (or https://developer.mozilla.org/en-US/docs/Web/CSS/scroll-margin-top) for details.
Edited by Dan Allen