Tether is a positioning engine that manages the placement of UI elements in relation to one another on a web page.
The tool solves the problem of precisely positioning overlays, tooltips, dropdowns, and similar UI elements that need to attach to other elements while accounting for complex layout scenarios. These scenarios include fixed positioning, scrollable containers, viewport boundaries, and DOM tree constraints that make simple adjacent placement problematic. Tether handles dynamic repositioning as users interact with the page through scrolling, clicking, and other actions, ensuring attached elements remain visible and properly positioned regardless of their context.
Developers building features with positioned UI elements should consider Tether when standard DOM positioning proves insufficient. It suits projects requiring tooltips, select menus, dropdown menus, or any interface where elements must stay anchored to other elements while adapting to scrolling, viewport edges, and container overflow. The tool is small and focused, making it appropriate for developers who want a dedicated positioning solution rather than a larger UI framework.
The project recently transitioned to new maintainers who have committed to modernizing and revitalizing it. The team is actively working on updates to the codebase following this transition.
