This feature is experimental. It may be removed or changed in a future version without prior notice or deprecation.
Reveals an element matching the #hash in the current URL.
Other than the default behavior found in browsers, up.revealHash works with
multiple viewports and honors fixed elements obstructing the user's
view of the viewport.
This is called automatically when the page loads initially.
A promise that is fulfilled when scroll position has changed to match the location hash.