Pull Request: Sticky breadcrumb and sidebar navs by davidmcguiredesign · Pull Request #1198 · php/web-php · GitHub
Author: davidmcguiredesign
Both the breadcrumb (parent) and sidebar (sibling) navs provide key context while reading the page. Making them sticky (and optionally giving the sidebar nav its own scroll context) makes their context available to the whole page, not just the start.