Why Your z-index Fails: The Definitive Guide to Fixing Dropdown Clipping with the Portal Pattern

Have you ever faced the frustrating issue of a well-designed multi-select dropdown being mercilessly clipped inside a table or a scrolling container? No matter how high you set the z-index, it just won't work. This article dives deep into the 'invisible killer' known as the CSS Stacking Context and provides an ultimate solution called the 'Portal' pattern. By using JavaScript for dynamic positioning, your dropdown menus will break free from their container's constraints for good.