CSS Sticky

In plain words: A sticky header is a navigation bar or title block that stays locked to the top of the browser window when a user scrolls down a long page. In Salesforce Lightning Web Components (LWC), you don't need complex JavaScript window listeners to achieve this—modern CSS position: sticky handles it natively and smoothly. When building custom applications in Salesforce, users often have to scroll through dense pages filled with records, forms, and data tables. Keeping action buttons or titles visible at all times greatly improves usability and navigation. In this guide, we will build a reusable, dynamic sticky header component in Lightning Web Components (LWC) using clean HTML markup and CSS.