accessible-menu-bootstrap-4

A JavaScript library to help you generate WAI-ARIA accessible menus with in the DOM using Bootstrap 4.

This project is an extension of accessible-menu to allow out-of-the-box for Bootstrap 4 compatibility.

The supported menu types are:

• Disclosure Navigation Menus,
• Navigation Menubar, and
• Navigation Treeview

Browser Support

| Chrome | Firefox | Safari | Edge | Chromium | Webkit | | --- | --- | --- | --- | --- | --- | | last 2 versions | last 2 versions | last 2 versions | last 2 versions | last 2 versions | last 2 versions |

Found something that doesn't work the way it should in one of the listed browsers above? Open an issue!

Installation

NPM

NPM is recommended for large-scale development, since it works well with bundlers like Webpack or Rollup.

# latest stable
npm install accessible-menu-bootstrap-4

CDN

For learning/prototyping purposes you can use the latest version with:

<script src="https://cdn.jsdelivr.net/npm/accessible-menu-bootstrap-4/dist/accessible-menu-bs4.js"></script>

For production environments, it is recommend to use a specific version to avoid unforseen breaking changes:

<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/accessible-menu-bs4.min.js"></script>

Usage

To use accessible-menu-bootstrap-4, you first need to make sure your menu matches the following structure:

<ul id="example-menu" class="navbar-nav">
  <li class="nav-item"><a href="/about" class="nav-link">About</a></li>
  <li class="nav-item dropdown">
    <a href="#" class="nav-link dropdown-toggle">Projects ▼</a>
    <ul class="dropdown-menu">
      <li class="nav-item"><a href="/projects/awesome" class="dropdown-item">Awesome project</a></li>
      <li class="nav-item"><a href="/projects/not-so-awesome" class="dropdown-item">Not-so-awesome project</a></li>
    </ul>
  </li>
  <li class="nav-item"><a href="/contact" class="nav-link">Contact me</a></li>
</ul>

Include accessible-menu-bootstrap-4 through import or bundled library in your project:

import AccessibleMenu from "accessible-menu-bootstrap-4";

or

<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/accessible-menu-bs4.min.js"></script>

Once you have accessible-menu-bootstrap-4 loaded, declare a new menu object.

menuElement is required for all menus. Unlike accessible-menu, accessible-menu-bootstrap-4 will automatically find dropdown menus since the classes .dropdown, .dropdown-menu, and .dropdown-item are included in the Bootstrap 4 framework.

const menu = new AccessibleMenu.DisclosureMenu({
  menuElement: document.querySelector("#example-menu"),
});

Only need one type of menu class?

Bundled versions of each menu are provided in the dist and individual exports are provided in the index.

There are also compiled ES Module versions if you don't want to use an iife!

Bootstrap4DisclosureMenu usage

import { Bootstrap4DisclosureMenu } from "accessible-menu-bootstrap-4";

or

<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/disclosure-menu-bs4.min.js"></script>

then

const menu = new Bootstrap4DisclosureMenu({
  menuElement: document.querySelector("#example-menu"),
});

Bootstrap4Menubar usage

import { Bootstrap4Menubar } from "accessible-menu-bootstrap-4";

or

<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/menubar-bs4.min.js"></script>

then

const menu = new Bootstrap4Menubar({
  menuElement: document.querySelector("#example-menu"),
});

Bootstrap4Treeview usage

import { Bootstrap4Treeview } from "accessible-menu-bootstrap-4";

or

<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/treeview-bs4.min.js"></script>

then

const menu = new Bootstrap4Treeview({
  menuElement: document.querySelector("#example-menu"),
});

Documentation

• accessible-menu API Documentation
• Basics
  • Single-level menu
  • Single-level menu with toggle
  • Two-level menu with toggle

Conflict with Bootstrap's own navbar toggle

Bootstrap 4 has it's own implementation of expanding/collapsing menus using the data-toggle attribute on navbar togglers and dropdown toggles which would cause both accessible-menu-bootstrap-4 and Bootstrap's own toggler to open/close menus at the same time. To resolve this issue, accessible-menu-bootstrap-4 removed the data-toggle attributes from menu toggles that it controls.

Other versions of Bootstrap

This project isn't designed to work with other versions of Bootstrap other than v4, however you could probably get it to work with Bootstrap 3 by customizing the selectors and open/close classes when declaring the menu.

You also might be able to get this to work with Bootstrap 5, however v5 changed the data-toggle value on dropdowns to data-bs-toggle which won't be handled by this project. A Bootstrap 5 specific project may be created if there is enough interest in it.

Versioning

This project uses Semantic Versioning 2.0.0 to keep track of releases.

For more detailed information about SemVer, please see the official documentation.

Contributing

If you're interested in contributing to the project, please read the Contribution Guidelines. Any and all contributions must follow these guidelines or they will not be accepted.

Sponsors