Sticky header not working for simplified headers (o-header)

[petrklus]

We are using a simplified version of the o-header and we are experiencing issues with the sticky behaviour.

We have narrowed the issue down to the following line:

origami/components/o-header/src/js/sticky.js

Line 29 in 027b716

const isHeaderExpanded = stickyHeaderContainer.getAttribute('aria-hidden');

As we do not have any element with ID o-header-search-sticky, the stickyHeaderContainer is null and thus stickyHeaderContainer.getAttribute('aria-hidden'); fails.

We have fixed this temporarily by adding an element with said ID into our sticky header markup:

<div id="o-header-search-sticky" style="display: none;"></div>

Which fixes the sticky header initialisation issue.

The issue seems to have been introduced here: 027b716