Hover Save Zone

by Plippie Plop

HTML

<!doctype html>
<html lang="en">

<head>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0, user-scalable=no, shrink-to-fit=no" />
    <!-- Begin SEO tag -->
    <title>Infinite Multiple Level Dropdown Menu base on Bootstrap</title>
    <link href="https://cdn.jsdelivr.net/npm/[email protected]/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-EVSTQN3/azprG1Anm3QDgpJLIm9Nao0Yz1ztcQTwFspd3yD65VohhpuuCOmLASjC" crossorigin="anonymous">
    <style>.dropdown-hover-all .dropdown-menu, .dropdown-hover > .dropdown-menu.dropend { margin-left:-1px !important }</style>
</head>

<body class="">
    <nav class="navbar navbar-expand-md navbar-dark fixed-top bg-dark">
        <div class="collapse navbar-collapse" id="navbarsExampleDefault">
            <ul class="navbar-nav mr-auto">
                <li class="nav-item active">
                    <a class="nav-link" href="#">Demo <span class="sr-only">(current)</span></a>
                </li>
                <li class="nav-item dropdown dropdown-hover">
                    <a class="nav-link dropdown-toggle" href="#" id="dropdown01" data-bs-toggle="dropdown" aria-haspopup="true" aria-expanded="false">Hover</a>
                    <div class="dropdown-menu" aria-labelledby="dropdown01">
                        <a class="dropdown-item" href="#">Single App</a>
                        <a class="dropdown-item" href="#">Multiple Works</a>
                        <div class="dropdown-divider"></div>
                        <a class="dropdown-item" href="#">Disctribution</a>
                    </div>
                </li>
                <li class="nav-item dropdown">
                    <a class="nav-link dropdown-toggle" href="#" id="dropdown02" data-bs-toggle="dropdown" aria-haspopup="true" aria-expanded="false">Documents</a>
                    <div class="dropdown-menu" aria-labelledby="dropdown02">
                        <a...

CSS

/* Exammple for creating a hover savezone*/
.dropdown-menu::before{
  content:"";
  position:absolute;
  top:-10px;
  left:-5px;
  right:-10px;
  bottom:-30px;
  border:1px solid red; 
  z-index:-1;
  cursor:pointer;  
}

JavaScript

(function($bs) {
    const CLASS_NAME = 'has-child-dropdown-show';
    $bs.Dropdown.prototype.toggle = function(_orginal) {
        return function() {
            document.querySelectorAll('.' + CLASS_NAME).forEach(function(e) {
                e.classList.remove(CLASS_NAME);
            });
            let dd = this._element.closest('.dropdown').parentNode.closest('.dropdown');
            for (; dd && dd !== document; dd = dd.parentNode.closest('.dropdown')) {
                dd.classList.add(CLASS_NAME);
            }
            return _orginal.call(this);
        }
    }($bs.Dropdown.prototype.toggle);

    document.querySelectorAll('.dropdown').forEach(function(dd) {
        dd.addEventListener('hide.bs.dropdown', function(e) {
            if (this.classList.contains(CLASS_NAME)) {
                this.classList.remove(CLASS_NAME);
                e.preventDefault();
            }
            e.stopPropagation(); // do not need pop in multi level mode
        });
    });

    // for hover
    document.querySelectorAll('.dropdown-hover, .dropdown-hover-all .dropdown').forEach(function(dd) {
        dd.addEventListener('mouseenter', function(e) {
            let toggle = e.target.querySelector(':scope>[data-bs-toggle="dropdown"]');
            if (!toggle.classList.contains('show')) {
                $bs.Dropdown.getOrCreateInstance(toggle).toggle();
                dd.classList.add(CLASS_NAME);
                $bs.Dropdown.clearMenus();
            }
        });
        dd.addEventListener('mouseleave', function(e) {
            let toggle = e.target.querySelector(':scope>[data-bs-toggle="dropdown"]');
            if (toggle.classList.contains('show')) {
                $bs.Dropdown.getOrCreateInstance(toggle).toggle();
            }
        });
    });
})(bootstrap);