模式 簡單
Nav Underline Effect
Animated underline on active nav link — smooth indicator for tabs and breadcrumbs.
css vanilla-js
目標: JS HTML
程式碼
Nav Underline Effect
Animated underline that follows the active link. Reference patterns from tabs-vertical and breadcrumb-nav.
Features
- CSS transition for underline position/width
- Single moving indicator or per-link underline
- No dependencies