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Mobile bootstrap offcanvas navbar

Skill mhrsdev/AI-Agent-Skills-Library/organized-skills/responsive-mobile-navigation/mobile-bootstrap-offcanvas-navbar

Use when building or fixing mobile-first navbar collapse, offcanvas drawers, ARIA-expanded sync, overflow handling, and Bootstrap-like responsive navigation.From its SKILL.md

Install
npx -y skills add mhrsdev/AI-Agent-Skills-Library --skill mobile-bootstrap-offcanvas-navbar

Assembled from the repository path, not quoted from the project. Check it against their README if it does not work.

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SKILL.md

1.4 KB, 231 tokens by cl100k_base, as published. Nobody here has run it

Mobile Bootstrap Offcanvas Navbar

Use this skill for mobile-first navbars, collapse panels, and offcanvas drawers inspired by twbs/bootstrap.

Primary source:

Focus areas:

  • Navbar collapse state.
  • Offcanvas drawer layout and transitions.
  • aria-expanded and collapsed class synchronization.
  • Mobile menu overflow when the menu is taller than the viewport.
  • Modal/offcanvas scroll behavior on iOS.

Checklist:

  • Toggle with a real button.
  • Keep aria-expanded, hidden state, and visual class state aligned.
  • Make long collapsed menus scrollable with max-height and overflow-y: auto.
  • Use fixed positioning for offcanvas panels and a separate backdrop layer.
  • Lock background scroll when offcanvas is modal.
  • Test with many menu items, landscape mobile, and small 320px screens.

Common fixes:

  • If an expanded navbar cannot scroll on mobile, constrain its height and enable vertical overflow.
  • If the body scrolls behind offcanvas, add modal-style scroll lock.
  • If state desynchronizes after resizing, reset mobile collapse state at desktop breakpoints.

What ships with it: 1 file

2.4 KB alongside SKILL.md

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