db906fd85a
- Replace .eslintrc.cjs with eslint.config.mjs (ESLint 9 flat config)
using direct eslint-plugin-solid + @typescript-eslint/parser approach
- Add @typescript-eslint/parser to root devDependencies
- Add main/module/types top-level fields to packages/core/package.json
- Add resolve.conditions to packages/core/vite.config.ts
- Create packages/core/tsconfig.test.json for test type-checking
- Remove empty paths:{} from packages/core/tsconfig.json
2.9 KiB
CSS Anchor Positioning 2026: Practical Guide for Tooltips, Menus, and Smart Overlays
Positioning contextual UI has always been painful. Dropdowns, tooltips, and popovers often require JavaScript calculations, viewport checks, and custom collision logic. CSS Anchor Positioning moves a large part of this work into native styling.
Why It Matters
- dropdown clipped on small screens
- tooltip detached from trigger on scroll
- menu appears off-screen in RTL or localized UI
Core Mental Model
Define an anchor element Attach floating UI to that anchor Let CSS handle alignment behavior
Real Use Cases
- action menu in data tables
- profile dropdown in sticky headers
- inline help tooltip in forms
- contextual edit controls in CMS
UX Rules
- keep overlays close to trigger
- preserve keyboard focus flow
- add deterministic closing behavior
- avoid huge animation while repositioning
Rollout Strategy
tooltip dropdown popover with richer content
Conclusion
Anchor positioning is a structural improvement that reduces UI fragility in real products.
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