This code implements a responsive drop-down menu with sub-menus in the sidebar using the Pro Sidebar library. The menu items can be expanded to reveal sub-menus, and clicking on a menu item toggles the visibility of its corresponding sub-menu. The sidebar can also be collapsed or expanded based on user interaction, and popper positioning is updated accordingly.
How to Create a Responsive Drop-Down Menu With Sub-menu In the Sidebar
1. First of all, load the Google Fonts and Remix Icon CSS by adding the following CDN links into the head tag of your HTML document.
<link rel='stylesheet' href='https://cdn.jsdelivr.net/npm/[email protected]/fonts/remixicon.css'> <link rel='stylesheet' href='https://unpkg.com/[email protected]/dist/css/css-pro-layout.css'> <link rel='stylesheet' href='https://fonts.googleapis.com/css2?family=Poppins:wght@100;200;300;400;500;600;700;800;900&display=swap'>
2. Now, set up the HTML structure for our sidebar menu. Here’s a basic example:
<div class="layout has-sidebar fixed-sidebar fixed-header">
<aside id="sidebar" class="sidebar break-point-sm has-bg-image">
<a id="btn-collapse" class="sidebar-collapser"><i class="ri-arrow-left-s-line"></i></a>
<div class="image-wrapper">
<img src="assets/images/sidebar-bg.jpg" alt="sidebar background" />
</div>
<div class="sidebar-layout">
<div class="sidebar-header">
<div class="pro-sidebar-logo">
<div>P</div>
<h5>Pro Sidebar</h5>
</div>
</div>
<div class="sidebar-content">
<nav class="menu open-current-submenu">
<ul>
<li class="menu-header"><span> GENERAL </span></li>
<li class="menu-item sub-menu">
<a href="#">
<span class="menu-icon">
<i class="ri-vip-diamond-fill"></i>
</span>
<span class="menu-title">Components</span>
<span class="menu-suffix">
<span class="badge primary">Hot</span>
</span>
</a>
<div class="sub-menu-list">
<ul>
<li class="menu-item">
<a href="#">
<span class="menu-title">Grid</span>
</a>
</li>
<li class="menu-item">
<a href="#">
<span class="menu-title">Layout</span>
</a>
</li>
<li class="menu-item sub-menu">
<a href="#">
<span class="menu-title">Forms</span>
</a>
<div class="sub-menu-list">
<ul>
<li class="menu-item">
<a href="#">
<span class="menu-title">Input</span>
</a>
</li>
<li class="menu-item">
<a href="#">
<span class="menu-title">Select</span>
</a>
</li>
<li class="menu-item sub-menu">
<a href="#">
<span class="menu-title">More</span>
</a>
<div class="sub-menu-list">
<ul>
<li class="menu-item">
<a href="#">
<span class="menu-title">CheckBox</span>
</a>
</li>
<li class="menu-item">
<a href="#">
<span class="menu-title">Radio</span>
</a>
</li>
<li class="menu-item sub-menu">
<a href="#">
<span class="menu-title">Want more ?</span>
<span class="menu-suffix">🤔</span>
</a>
<div class="sub-menu-list">
<ul>
<li class="menu-item">
<a href="#">
<span class="menu-prefix">🎉</span>
<span class="menu-title">You made it </span>
</a>
</li>
</ul>
</div>
</li>
</ul>
</div>
</li>
</ul>
</div>
</li>
</ul>
</div>
</li>
<li class="menu-item sub-menu">
<a href="#">
<span class="menu-icon">
<i class="ri-bar-chart-2-fill"></i>
</span>
<span class="menu-title">Charts</span>
</a>
<div class="sub-menu-list">
<ul>
<li class="menu-item">
<a href="#">
<span class="menu-title">Pie chart</span>
</a>
</li>
<li class="menu-item">
<a href="#">
<span class="menu-title">Line chart</span>
</a>
</li>
<li class="menu-item">
<a href="#">
<span class="menu-title">Bar chart</span>
</a>
</li>
</ul>
</div>
</li>
<li class="menu-item sub-menu">
<a href="#">
<span class="menu-icon">
<i class="ri-shopping-cart-fill"></i>
</span>
<span class="menu-title">E-commerce</span>
</a>
<div class="sub-menu-list">
<ul>
<li class="menu-item">
<a href="#">
<span class="menu-title">Products</span>
</a>
</li>
<li class="menu-item">
<a href="#">
<span class="menu-title">Orders</span>
</a>
</li>
<li class="menu-item">
<a href="#">
<span class="menu-title">credit card</span>
</a>
</li>
</ul>
</div>
</li>
<li class="menu-item sub-menu">
<a href="#">
<span class="menu-icon">
<i class="ri-global-fill"></i>
</span>
<span class="menu-title">Maps</span>
</a>
<div class="sub-menu-list">
<ul>
<li class="menu-item">
<a href="#">
<span class="menu-title">Google maps</span>
</a>
</li>
<li class="menu-item">
<a href="#">
<span class="menu-title">Open street map</span>
</a>
</li>
</ul>
</div>
</li>
<li class="menu-item sub-menu">
<a href="#">
<span class="menu-icon">
<i class="ri-paint-brush-fill"></i>
</span>
<span class="menu-title">Theme</span>
</a>
<div class="sub-menu-list">
<ul>
<li class="menu-item">
<a href="#">
<span class="menu-title">Dark</span>
</a>
</li>
<li class="menu-item">
<a href="#">
<span class="menu-title">Light</span>
</a>
</li>
</ul>
</div>
</li>
<li class="menu-header" style="padding-top: 20px"><span> EXTRA </span></li>
<li class="menu-item">
<a href="#">
<span class="menu-icon">
<i class="ri-book-2-fill"></i>
</span>
<span class="menu-title">Documentation</span>
<span class="menu-suffix">
<span class="badge secondary">Beta</span>
</span>
</a>
</li>
<li class="menu-item">
<a href="#">
<span class="menu-icon">
<i class="ri-calendar-fill"></i>
</span>
<span class="menu-title">Calendar</span>
</a>
</li>
<li class="menu-item">
<a href="#">
<span class="menu-icon">
<i class="ri-service-fill"></i>
</span>
<span class="menu-title">Examples</span>
</a>
</li>
</ul>
</nav>
</div>
<div class="sidebar-footer">
<div class="footer-box">
<div>
<img
class="react-logo"
src="https://user-images.githubusercontent.com/25878302/213938106-ca8f0485-3f30-4861-9188-2920ed7ab284.png"
alt="react"
/>
</div>
<div style="padding: 0 10px">
<span style="display: block; margin-bottom: 10px"
>Pro sidebar is also available as a react package
</span>
<div style="margin-bottom: 15px">
<img
alt="preview badge"
src="https://img.shields.io/github/stars/azouaoui-med/react-pro-sidebar?style=social"
/>
</div>
<div>
<a href="https://github.com/azouaoui-med/react-pro-sidebar" target="_blank"
>Check it out!</a
>
</div>
</div>
</div>
</div>
</div>
</aside>
<div id="overlay" class="overlay"></div>
<div class="layout">
<main class="content">
<div>
<a id="btn-toggle" href="#" class="sidebar-toggler break-point-sm">
<i class="ri-menu-line ri-xl"></i>
</a>
<h1 style="margin-bottom: 0">Pro Sidebar</h1>
<span style="display: inline-block">
Responsive layout with advanced sidebar menu built with SCSS and vanilla Javascript
</span>
<br />
<span>
Full Code and documentation available on
<a href="https://github.com/azouaoui-med/pro-sidebar-template" target="_blank"
>Github</a
>
</span>
<div style="margin-top: 10px">
<a href="https://github.com/azouaoui-med/pro-sidebar-template" target="_blank">
<img
alt="GitHub stars"
src="https://img.shields.io/github/stars/azouaoui-med/pro-sidebar-template?style=social"
/>
</a>
<a href="https://github.com/azouaoui-med/pro-sidebar-template" target="_blank">
<img
alt="GitHub forks"
src="https://img.shields.io/github/forks/azouaoui-med/pro-sidebar-template?style=social"
/>
</a>
</div>
</div>
<div>
<h2>Features</h2>
<ul>
<li>Fully responsive</li>
<li>Collapsable sidebar</li>
<li>Multi level menu</li>
<li>RTL support</li>
<li>Customizable</li>
</ul>
</div>
<div>
<h2>Resources</h2>
<ul>
<li>
<a target="_blank" href="https://github.com/azouaoui-med/css-pro-layout">
Css Pro Layout</a
>
</li>
<li>
<a target="_blank" href="https://github.com/popperjs/popper-core"> Popper Core</a>
</li>
<li>
<a target="_blank" href="https://remixicon.com/"> Remix Icons</a>
</li>
</ul>
</div>
<footer class="footer">
<small style="margin-bottom: 20px; display: inline-block">
© 2023 made with
<span style="color: red; font-size: 18px">❤</span> by -
<a target="_blank" href="https://azouaoui.netlify.com"> Mohamed Azouaoui </a>
</small>
<br />
<div class="social-links">
<a href="https://github.com/azouaoui-med" target="_blank">
<i class="ri-github-fill ri-xl"></i>
</a>
<a href="https://twitter.com/azouaoui_med" target="_blank">
<i class="ri-twitter-fill ri-xl"></i>
</a>
<a href="https://codepen.io/azouaoui-med" target="_blank">
<i class="ri-codepen-fill ri-xl"></i>
</a>
<a href="https://www.linkedin.com/in/mohamed-azouaoui/" target="_blank">
<i class="ri-linkedin-box-fill ri-xl"></i>
</a>
</div>
</footer>
</main>
<div class="overlay"></div>
</div>
</div>
3. Now, let’s style our sidebar menu using CSS. Below is a snippet to style the sidebar layout. You can customize it further according to your design preferences:
.layout {
z-index: 1;
}
.layout .header {
display: flex;
align-items: center;
padding: 20px;
}
.layout .content {
padding: 12px 50px;
display: flex;
flex-direction: column;
}
.layout .footer {
text-align: center;
margin-top: auto;
margin-bottom: 20px;
padding: 20px;
}
.sidebar {
color: #7d84ab;
overflow-x: hidden !important;
position: relative;
}
.sidebar::-webkit-scrollbar-thumb {
border-radius: 4px;
}
.sidebar:hover::-webkit-scrollbar-thumb {
background-color: #1a4173;
}
.sidebar::-webkit-scrollbar {
width: 6px;
background-color: #0c1e35;
}
.sidebar .image-wrapper {
overflow: hidden;
position: absolute;
top: 0;
right: 0;
bottom: 0;
left: 0;
z-index: 1;
display: none;
}
.sidebar .image-wrapper > img {
width: 100%;
height: 100%;
object-fit: cover;
object-position: center;
}
.sidebar.has-bg-image .image-wrapper {
display: block;
}
.sidebar .sidebar-layout {
height: auto;
min-height: 100%;
display: flex;
flex-direction: column;
position: relative;
background-color: #0c1e35;
z-index: 2;
}
.sidebar .sidebar-layout .sidebar-header {
height: 100px;
min-height: 100px;
display: flex;
align-items: center;
padding: 0 20px;
}
.sidebar .sidebar-layout .sidebar-header > span {
overflow: hidden;
white-space: nowrap;
text-overflow: ellipsis;
}
.sidebar .sidebar-layout .sidebar-content {
flex-grow: 1;
padding: 10px 0;
}
.sidebar .sidebar-layout .sidebar-footer {
height: 230px;
min-height: 230px;
display: flex;
align-items: center;
padding: 0 20px;
}
.sidebar .sidebar-layout .sidebar-footer > span {
overflow: hidden;
white-space: nowrap;
text-overflow: ellipsis;
}
@keyframes swing {
0%, 30%, 50%, 70%, 100% {
transform: rotate(0deg);
}
10% {
transform: rotate(10deg);
}
40% {
transform: rotate(-10deg);
}
60% {
transform: rotate(5deg);
}
80% {
transform: rotate(-5deg);
}
}
.layout .sidebar .menu ul {
list-style-type: none;
padding: 0;
margin: 0;
}
.layout .sidebar .menu .menu-header {
font-weight: 600;
padding: 10px 25px;
font-size: 0.8em;
letter-spacing: 2px;
transition: opacity 0.3s;
opacity: 0.5;
}
.layout .sidebar .menu .menu-item a {
display: flex;
align-items: center;
height: 50px;
padding: 0 20px;
color: #7d84ab;
}
.layout .sidebar .menu .menu-item a .menu-icon {
font-size: 1.2rem;
width: 35px;
min-width: 35px;
height: 35px;
line-height: 35px;
text-align: center;
display: inline-block;
margin-right: 10px;
border-radius: 2px;
transition: color 0.3s;
}
.layout .sidebar .menu .menu-item a .menu-icon i {
display: inline-block;
}
.layout .sidebar .menu .menu-item a .menu-title {
font-size: 0.9em;
overflow: hidden;
text-overflow: ellipsis;
white-space: nowrap;
flex-grow: 1;
transition: color 0.3s;
}
.layout .sidebar .menu .menu-item a .menu-prefix,
.layout .sidebar .menu .menu-item a .menu-suffix {
display: inline-block;
padding: 5px;
opacity: 1;
transition: opacity 0.3s;
}
.layout .sidebar .menu .menu-item a:hover .menu-title {
color: #dee2ec;
}
.layout .sidebar .menu .menu-item a:hover .menu-icon {
color: #dee2ec;
}
.layout .sidebar .menu .menu-item a:hover .menu-icon i {
animation: swing ease-in-out 0.5s 1 alternate;
}
.layout .sidebar .menu .menu-item a:hover::after {
border-color: #dee2ec !important;
}
.layout .sidebar .menu .menu-item.sub-menu {
position: relative;
}
.layout .sidebar .menu .menu-item.sub-menu > a::after {
content: "";
transition: transform 0.3s;
border-right: 2px solid currentcolor;
border-bottom: 2px solid currentcolor;
width: 5px;
height: 5px;
transform: rotate(-45deg);
}
.layout .sidebar .menu .menu-item.sub-menu > .sub-menu-list {
padding-left: 20px;
display: none;
overflow: hidden;
z-index: 999;
}
.layout .sidebar .menu .menu-item.sub-menu.open > a {
color: #dee2ec;
}
.layout .sidebar .menu .menu-item.sub-menu.open > a::after {
transform: rotate(45deg);
}
.layout .sidebar .menu .menu-item.active > a .menu-title {
color: #dee2ec;
}
.layout .sidebar .menu .menu-item.active > a::after {
border-color: #dee2ec;
}
.layout .sidebar .menu .menu-item.active > a .menu-icon {
color: #dee2ec;
}
.layout .sidebar .menu > ul > .sub-menu > .sub-menu-list {
background-color: #0b1a2c;
}
.layout .sidebar .menu.icon-shape-circle .menu-item a .menu-icon, .layout .sidebar .menu.icon-shape-rounded .menu-item a .menu-icon, .layout .sidebar .menu.icon-shape-square .menu-item a .menu-icon {
background-color: #0b1a2c;
}
.layout .sidebar .menu.icon-shape-circle .menu-item a .menu-icon {
border-radius: 50%;
}
.layout .sidebar .menu.icon-shape-rounded .menu-item a .menu-icon {
border-radius: 4px;
}
.layout .sidebar .menu.icon-shape-square .menu-item a .menu-icon {
border-radius: 0;
}
.layout .sidebar:not(.collapsed) .menu > ul > .menu-item.sub-menu > .sub-menu-list {
visibility: visible !important;
position: static !important;
transform: translate(0, 0) !important;
}
.layout .sidebar.collapsed .menu > ul > .menu-header {
opacity: 0;
}
.layout .sidebar.collapsed .menu > ul > .menu-item > a .menu-prefix,
.layout .sidebar.collapsed .menu > ul > .menu-item > a .menu-suffix {
opacity: 0;
}
.layout .sidebar.collapsed .menu > ul > .menu-item.sub-menu > a::after {
content: "";
width: 5px;
height: 5px;
background-color: currentcolor;
border-radius: 50%;
display: inline-block;
position: absolute;
right: 10px;
top: 50%;
border: none;
transform: translateY(-50%);
}
.layout .sidebar.collapsed .menu > ul > .menu-item.sub-menu > a:hover::after {
background-color: #dee2ec;
}
.layout .sidebar.collapsed .menu > ul > .menu-item.sub-menu > .sub-menu-list {
transition: none !important;
width: 200px;
margin-left: 3px !important;
border-radius: 4px;
display: block !important;
}
.layout .sidebar.collapsed .menu > ul > .menu-item.active > a::after {
background-color: #dee2ec;
}
.layout .sidebar.has-bg-image .menu.icon-shape-circle .menu-item a .menu-icon, .layout .sidebar.has-bg-image .menu.icon-shape-rounded .menu-item a .menu-icon, .layout .sidebar.has-bg-image .menu.icon-shape-square .menu-item a .menu-icon {
background-color: rgba(11, 26, 44, 0.6);
}
.layout .sidebar.has-bg-image:not(.collapsed) .menu > ul > .sub-menu > .sub-menu-list {
background-color: rgba(11, 26, 44, 0.6);
}
.layout.rtl .sidebar .menu .menu-item a .menu-icon {
margin-left: 10px;
margin-right: 0;
}
.layout.rtl .sidebar .menu .menu-item.sub-menu > a::after {
transform: rotate(135deg);
}
.layout.rtl .sidebar .menu .menu-item.sub-menu > .sub-menu-list {
padding-left: 0;
padding-right: 20px;
}
.layout.rtl .sidebar .menu .menu-item.sub-menu.open > a::after {
transform: rotate(45deg);
}
.layout.rtl .sidebar.collapsed .menu > ul > .menu-item.sub-menu a::after {
right: auto;
left: 10px;
}
.layout.rtl .sidebar.collapsed .menu > ul > .menu-item.sub-menu > .sub-menu-list {
margin-left: -3px !important;
}
* {
box-sizing: border-box;
}
body {
margin: 0;
height: 100vh;
font-family: "Poppins", sans-serif;
color: #3f4750;
font-size: 0.9rem;
}
a {
text-decoration: none;
}
@media (max-width: 576px) {
#btn-collapse {
display: none;
}
}
.layout .sidebar .pro-sidebar-logo {
display: flex;
align-items: center;
}
.layout .sidebar .pro-sidebar-logo > div {
width: 35px;
min-width: 35px;
height: 35px;
min-height: 35px;
display: flex;
align-items: center;
justify-content: center;
border-radius: 8px;
color: white;
font-size: 24px;
font-weight: 700;
background-color: #ff8100;
margin-right: 10px;
}
.layout .sidebar .pro-sidebar-logo > h5 {
overflow: hidden;
white-space: nowrap;
text-overflow: ellipsis;
font-size: 20px;
line-height: 30px;
transition: opacity 0.3s;
opacity: 1;
}
.layout .sidebar .footer-box {
display: flex;
flex-direction: column;
align-items: center;
justify-content: center;
text-align: center;
font-size: 0.8em;
padding: 20px 0;
border-radius: 8px;
width: 180px;
min-width: 190px;
margin: 0 auto;
background-color: #162d4a;
}
.layout .sidebar .footer-box img.react-logo {
width: 40px;
height: 40px;
margin-bottom: 10px;
}
.layout .sidebar .footer-box a {
color: #fff;
font-weight: 600;
margin-bottom: 10px;
}
.layout .sidebar .sidebar-collapser {
transition: left, right, 0.3s;
position: fixed;
left: 260px;
top: 40px;
width: 20px;
height: 20px;
border-radius: 50%;
background-color: #00829f;
display: -webkit-box;
display: -ms-flexbox;
display: flex;
-ms-flex-align: center;
align-items: center;
justify-content: center;
font-size: 1.2em;
transform: translateX(50%);
z-index: 111;
cursor: pointer;
color: white;
box-shadow: 1px 1px 4px #0c1e35;
}
.layout .sidebar.collapsed .pro-sidebar-logo > h5 {
opacity: 0;
}
.layout .sidebar.collapsed .footer-box {
display: none;
}
.layout .sidebar.collapsed .sidebar-collapser {
left: 60px;
}
.layout .sidebar.collapsed .sidebar-collapser i {
transform: rotate(180deg);
}
.badge {
display: inline-block;
padding: 0.25em 0.4em;
font-size: 75%;
font-weight: 700;
line-height: 1;
text-align: center;
white-space: nowrap;
vertical-align: baseline;
border-radius: 0.25rem;
color: #fff;
background-color: #6c757d;
}
.badge.primary {
background-color: #ab2dff;
}
.badge.secondary {
background-color: #079b0b;
}
.sidebar-toggler {
position: fixed;
right: 20px;
top: 20px;
}
.social-links a {
margin: 0 10px;
color: #3f4750;
}
4. Now, load the PopperJS by adding the following CDN link before closing the <body> tag:
<script src='https://unpkg.com/@popperjs/core@2'></script>
5. Finally, add the following JavaScript code to handle the menu functionality, including toggling sub-menus and sidebar collapse behavior. Here’s an example:
function _defineProperty(obj, key, value) {if (key in obj) {Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true });} else {obj[key] = value;}return obj;}const ANIMATION_DURATION = 300;
const SIDEBAR_EL = document.getElementById("sidebar");
const SUB_MENU_ELS = document.querySelectorAll(
".menu > ul > .menu-item.sub-menu");
const FIRST_SUB_MENUS_BTN = document.querySelectorAll(
".menu > ul > .menu-item.sub-menu > a");
const INNER_SUB_MENUS_BTN = document.querySelectorAll(
".menu > ul > .menu-item.sub-menu .menu-item.sub-menu > a");
class PopperObject {
constructor(reference, popperTarget) {_defineProperty(this, "instance", null);_defineProperty(this, "reference", null);_defineProperty(this, "popperTarget", null);
this.init(reference, popperTarget);
}
init(reference, popperTarget) {
this.reference = reference;
this.popperTarget = popperTarget;
this.instance = Popper.createPopper(this.reference, this.popperTarget, {
placement: "right",
strategy: "fixed",
resize: true,
modifiers: [
{
name: "computeStyles",
options: {
adaptive: false } },
{
name: "flip",
options: {
fallbackPlacements: ["left", "right"] } }] });
document.addEventListener(
"click",
e => this.clicker(e, this.popperTarget, this.reference),
false);
const ro = new ResizeObserver(() => {
this.instance.update();
});
ro.observe(this.popperTarget);
ro.observe(this.reference);
}
clicker(event, popperTarget, reference) {
if (
SIDEBAR_EL.classList.contains("collapsed") &&
!popperTarget.contains(event.target) &&
!reference.contains(event.target))
{
this.hide();
}
}
hide() {
this.instance.state.elements.popper.style.visibility = "hidden";
}}
class Poppers {
constructor() {_defineProperty(this, "subMenuPoppers", []);
this.init();
}
init() {
SUB_MENU_ELS.forEach(element => {
this.subMenuPoppers.push(
new PopperObject(element, element.lastElementChild));
this.closePoppers();
});
}
togglePopper(target) {
if (window.getComputedStyle(target).visibility === "hidden")
target.style.visibility = "visible";else
target.style.visibility = "hidden";
}
updatePoppers() {
this.subMenuPoppers.forEach(element => {
element.instance.state.elements.popper.style.display = "none";
element.instance.update();
});
}
closePoppers() {
this.subMenuPoppers.forEach(element => {
element.hide();
});
}}
const slideUp = (target, duration = ANIMATION_DURATION) => {
const { parentElement } = target;
parentElement.classList.remove("open");
target.style.transitionProperty = "height, margin, padding";
target.style.transitionDuration = `${duration}ms`;
target.style.boxSizing = "border-box";
target.style.height = `${target.offsetHeight}px`;
target.offsetHeight;
target.style.overflow = "hidden";
target.style.height = 0;
target.style.paddingTop = 0;
target.style.paddingBottom = 0;
target.style.marginTop = 0;
target.style.marginBottom = 0;
window.setTimeout(() => {
target.style.display = "none";
target.style.removeProperty("height");
target.style.removeProperty("padding-top");
target.style.removeProperty("padding-bottom");
target.style.removeProperty("margin-top");
target.style.removeProperty("margin-bottom");
target.style.removeProperty("overflow");
target.style.removeProperty("transition-duration");
target.style.removeProperty("transition-property");
}, duration);
};
const slideDown = (target, duration = ANIMATION_DURATION) => {
const { parentElement } = target;
parentElement.classList.add("open");
target.style.removeProperty("display");
let { display } = window.getComputedStyle(target);
if (display === "none") display = "block";
target.style.display = display;
const height = target.offsetHeight;
target.style.overflow = "hidden";
target.style.height = 0;
target.style.paddingTop = 0;
target.style.paddingBottom = 0;
target.style.marginTop = 0;
target.style.marginBottom = 0;
target.offsetHeight;
target.style.boxSizing = "border-box";
target.style.transitionProperty = "height, margin, padding";
target.style.transitionDuration = `${duration}ms`;
target.style.height = `${height}px`;
target.style.removeProperty("padding-top");
target.style.removeProperty("padding-bottom");
target.style.removeProperty("margin-top");
target.style.removeProperty("margin-bottom");
window.setTimeout(() => {
target.style.removeProperty("height");
target.style.removeProperty("overflow");
target.style.removeProperty("transition-duration");
target.style.removeProperty("transition-property");
}, duration);
};
const slideToggle = (target, duration = ANIMATION_DURATION) => {
if (window.getComputedStyle(target).display === "none")
return slideDown(target, duration);
return slideUp(target, duration);
};
const PoppersInstance = new Poppers();
/**
* wait for the current animation to finish and update poppers position
*/
const updatePoppersTimeout = () => {
setTimeout(() => {
PoppersInstance.updatePoppers();
}, ANIMATION_DURATION);
};
/**
* sidebar collapse handler
*/
document.getElementById("btn-collapse").addEventListener("click", () => {
SIDEBAR_EL.classList.toggle("collapsed");
PoppersInstance.closePoppers();
if (SIDEBAR_EL.classList.contains("collapsed"))
FIRST_SUB_MENUS_BTN.forEach(element => {
element.parentElement.classList.remove("open");
});
updatePoppersTimeout();
});
/**
* sidebar toggle handler (on break point )
*/
document.getElementById("btn-toggle").addEventListener("click", () => {
SIDEBAR_EL.classList.toggle("toggled");
updatePoppersTimeout();
});
/**
* toggle sidebar on overlay click
*/
document.getElementById("overlay").addEventListener("click", () => {
SIDEBAR_EL.classList.toggle("toggled");
});
const defaultOpenMenus = document.querySelectorAll(".menu-item.sub-menu.open");
defaultOpenMenus.forEach(element => {
element.lastElementChild.style.display = "block";
});
/**
* handle top level submenu click
*/
FIRST_SUB_MENUS_BTN.forEach(element => {
element.addEventListener("click", () => {
if (SIDEBAR_EL.classList.contains("collapsed"))
PoppersInstance.togglePopper(element.nextElementSibling);else
{
const parentMenu = element.closest(".menu.open-current-submenu");
if (parentMenu)
parentMenu.
querySelectorAll(":scope > ul > .menu-item.sub-menu > a").
forEach(
(el) =>
window.getComputedStyle(el.nextElementSibling).display !==
"none" && slideUp(el.nextElementSibling));
slideToggle(element.nextElementSibling);
}
});
});
/**
* handle inner submenu click
*/
INNER_SUB_MENUS_BTN.forEach(element => {
element.addEventListener("click", () => {
slideToggle(element.nextElementSibling);
});
});
That’s all! hopefully, you have successfully created a drop-down menu with a sub-menu in the sidebar. If you have any questions or suggestions, feel free to comment below.
