Simple JS navigation module(includes links "click" and "mouseover" events)" for your website, which gives you possibility to get rid of routine.

Example:

https://codepen.io/mickyholbrook/pen/GRjqwJj

Installation:

npm

npm i nav-menu-js

Load the required JS to your entry JS file:

let NavMenu = require('nav-menu-js');   
or    
import NavMenu from 'nav-menu-js';

Load the required stylesheet to your entry CSS file:

@import "node_modules/nav-menu-js/index";

Cloning git repository

1. Go to your project directory
2. git clone https://github.com/dmitriyakkerman/nav-menu-js.git .

Put the required stylesheet link in HEAD tag:

<link rel="stylesheet" href="./dist/css/nav-menu.min.css">

Put the module script at the bottom of your markup:

<script src="./dist/js/nav-menu.min.js"></script>  

Usage

Create typical navigation structure with nested lists.

     <ul class="header-nav" role="navigation" aria-label="Header links">
         <li>
             <a href="">Home</a>
         </li>
         <li>
             <a href="">About</a>
         </li>
         <li>
             <a href="">Services</a>
             <ul>
                 <li>
                     <a href="">Service 1</a>
                 </li>
                 <li>
                     <a href="">Service 2</a>
                     <ul>
                         <li>
                             <a href="">Service 2.1</a>
                         </li>
                         <li>
                             <a href="">Service 2.2</a>
                         </li>
                     </ul>
                 </li>
             </ul>
         </li>
         <li>
             <a href="">Contact</a>
         </li>
     </ul>
     

Initialization

1. Specify root selector(string or DOM node) in "nav" option.

2. Specify "preventParentClick" option for preventing click event on parent links which have child elements("false" by default).

    //Initialization with script tag
   
    <script>
           document.addEventListener('DOMContentLoaded', function () {
             new NavMenu({
               nav: '.header-nav',
               preventParentClick: true
             });
           });
    </script>
       

   or

   //Initialization by creating [filename].js file and connecting in a script tag
       
   // init.js
       
   document.addEventListener('DOMContentLoaded', function () {
     new NavMenu({
       nav: '.header-nav',
       preventParentClick: true
     });
   }); 
      
   <script src="init.js"></script>