Alpine Headless UI

Headless, accessible UI primitives for Alpine.js, built with https://github.com/eldomagan/alpine-define-component.

This library provides unstyled, behavior-only components inspired by:

• Alpine UI components documentation
• Zag.js behavior and accessibility patterns

The goal is to give you composable Alpine components with correct state management, keyboard interactions, and ARIA attributes, while leaving all styling and markup control to you.

Features

• Headless (no styles, no markup assumptions)
• Accessible by default (keyboard and ARIA patterns applied)
• Per-component imports
• Built on Alpine.js v3

Installation

npm install alpine-headless-ui

Getting started

Register all components

import Alpine from 'alpinejs'
import AlpineHeadlessUI from 'alpine-headless-ui'

Alpine.plugin(AlpineHeadlessUI)
Alpine.start()

This registers all available headless ui components globally.

Register individual components

You can import and register only the components you need.

import Alpine from 'alpinejs'
import dialog from 'alpine-headless-ui/dialog'
import menu from 'alpine-headless-ui/menu'

Alpine.plugin(dialog)
Alpine.plugin(menu)
Alpine.start()

This keeps your bundle size minimal.

Component usage

All components follow the same pattern:

• A root element using x-<component>
• Named parts using x-<component>:<part>
• Optional scoped sub-parts for repeated items

The exact HTML structure is up to you.

Dialog

Example

<div x-dialog>
  <button x-dialog:trigger>Open Dialog</button>

  <div x-dialog:backdrop></div>

  <div x-dialog:positioner>
    <div x-dialog:content>
      <h2 x-dialog:title>Dialog Title</h2>
      <p x-dialog:description>
        This is a basic dialog example. Click outside or press Escape to close.
      </p>
      <button x-dialog:close-trigger>Close</button>
    </div>
  </div>
</div>

Behavior

• Focus is trapped inside the dialog when open
• Escape closes the dialog
• Focus returns to the trigger on close
• Backdrop click closes the dialog
• Body scroll prevented when open

Accessibility

Alpine Headless UI components aim to follow WAI-ARIA authoring practices:

• Correct roles (dialog, menu, combobox, etc.)
• Keyboard interactions matching platform expectations
• Focus management on open and close

Behavior patterns are inspired by Zag.js state machines, adapted to Alpine idioms.

You are responsible for:

• Visual focus styles
• Animations and transitions
• Layout and spacing

Credits

Inspired by:

• Zag.js - State machine patterns for accessible components
• alpine-zag - Alpine.js integration with Zag.js

Created by:

• Eldo Magan
• All Contributors

📄 License

This project is open-sourced under the MIT license.