In this video tutorial, you will learn to create a responsive Sidebar Menu using HTML CSS & JavaScript with Dark and Light Mode. A sidebar is the combination of several navigation links aligned vertically at the left or right side of the web page. Sidebar helps users to get into the different webpage through the help of navigation links and they have open and close features. We have provided all source code that I have used to create this sidebar menu, the link has been given below.

Timestamps:
00:00 Sidebar Menu with Dark Light Mode | Demo
01:22 How do I Import Google fonts.
02:01 How do I Import Font Icons | Boxicons
02:39 How to create variables in CSS
03:03 Creating Sidebar in HTML
03:24 Styling Sidebar in CSS
10:08 Adding Search Bar in Sidebar
20:19 Creating Toggle for Light Dark Mode
22:25 JavaScript for the Sidebar

Source Code:

HTML File

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    
    <!----======== CSS ======== -->
    <link rel="stylesheet" href="style.css">
    
    <!----===== Boxicons CSS ===== -->
    <link href='https://unpkg.com/boxicons@2.1.1/css/boxicons.min.css' rel='stylesheet'>
    
    <!--<title>Dashboard Sidebar Menu</title>--> 
</head>
<body>
    <nav class="sidebar close">
        <header>
            <div class="image-text">
                <span class="image">
                    <!--<img src="logo.png" alt="">-->
                </span>

                <div class="text logo-text">
                    <span class="name">Codinglab</span>
                    <span class="profession">Web developer</span>
                </div>
            </div>

            <i class='bx bx-chevron-right toggle'></i>
        </header>

        <div class="menu-bar">
            <div class="menu">

                <li class="search-box">
                    <i class='bx bx-search icon'></i>
                    <input type="text" placeholder="Search...">
                </li>

                <ul class="menu-links">
                    <li class="nav-link">
                        <a href="#">
                            <i class='bx bx-home-alt icon' ></i>
                            <span class="text nav-text">Dashboard</span>
                        </a>
                    </li>

                    <li class="nav-link">
                        <a href="#">
                            <i class='bx bx-bar-chart-alt-2 icon' ></i>
                            <span class="text nav-text">Revenue</span>
                        </a>
                    </li>

                    <li class="nav-link">
                        <a href="#">
                            <i class='bx bx-bell icon'></i>
                            <span class="text nav-text">Notifications</span>
                        </a>
                    </li>

                    <li class="nav-link">
                        <a href="#">
                            <i class='bx bx-pie-chart-alt icon' ></i>
                            <span class="text nav-text">Analytics</span>
                        </a>
                    </li>

                    <li class="nav-link">
                        <a href="#">
                            <i class='bx bx-heart icon' ></i>
                            <span class="text nav-text">Likes</span>
                        </a>
                    </li>

                    <li class="nav-link">
                        <a href="#">
                            <i class='bx bx-wallet icon' ></i>
                            <span class="text nav-text">Wallets</span>
                        </a>
                    </li>

                </ul>
            </div>

            <div class="bottom-content">
                <li class="">
                    <a href="#">
                        <i class='bx bx-log-out icon' ></i>
                        <span class="text nav-text">Logout</span>
                    </a>
                </li>

                <li class="mode">
                    <div class="sun-moon">
                        <i class='bx bx-moon icon moon'></i>
                        <i class='bx bx-sun icon sun'></i>
                    </div>
                    <span class="mode-text text">Dark mode</span>

                    <div class="toggle-switch">
                        <span class="switch"></span>
                    </div>
                </li>
                
            </div>
        </div>

    </nav>

    <section class="home">
        <div class="text">Dashboard Sidebar</div>
    </section>

    <script>
        const body = document.querySelector('body'),
      sidebar = body.querySelector('nav'),
      toggle = body.querySelector(".toggle"),
      searchBtn = body.querySelector(".search-box"),
      modeSwitch = body.querySelector(".toggle-switch"),
      modeText = body.querySelector(".mode-text");


toggle.addEventListener("click" , () =>{
    sidebar.classList.toggle("close");
})

searchBtn.addEventListener("click" , () =>{
    sidebar.classList.remove("close");
})

modeSwitch.addEventListener("click" , () =>{
    body.classList.toggle("dark");
    
    if(body.classList.contains("dark")){
        modeText.innerText = "Light mode";
    }else{
        modeText.innerText = "Dark mode";
        
    }
});
    </script>

</body>
</html>

CSS File:

/* Google Font Import - Poppins */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700&display=swap');
*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Poppins', sans-serif;
}

:root{
    /* ===== Colors ===== */
    --body-color: #E4E9F7;
    --sidebar-color: #FFF;
    --primary-color: #695CFE;
    --primary-color-light: #F6F5FF;
    --toggle-color: #DDD;
    --text-color: #707070;

    /* ====== Transition ====== */
    --tran-03: all 0.2s ease;
    --tran-03: all 0.3s ease;
    --tran-04: all 0.3s ease;
    --tran-05: all 0.3s ease;
}

body{
    min-height: 100vh;
    background-color: var(--body-color);
    transition: var(--tran-05);
}

::selection{
    background-color: var(--primary-color);
    color: #fff;
}

body.dark{
    --body-color: #18191a;
    --sidebar-color: #242526;
    --primary-color: #3a3b3c;
    --primary-color-light: #3a3b3c;
    --toggle-color: #fff;
    --text-color: #ccc;
}

/* ===== Sidebar ===== */
 .sidebar{
    position: fixed;
    top: 0;
    left: 0;
    height: 100%;
    width: 250px;
    padding: 10px 14px;
    background: var(--sidebar-color);
    transition: var(--tran-05);
    z-index: 100;  
}
.sidebar.close{
    width: 88px;
}

/* ===== Reusable code - Here ===== */
.sidebar li{
    height: 50px;
    list-style: none;
    display: flex;
    align-items: center;
    margin-top: 10px;
}

.sidebar header .image,
.sidebar .icon{
    min-width: 60px;
    border-radius: 6px;
}

.sidebar .icon{
    min-width: 60px;
    border-radius: 6px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
}

.sidebar .text,
.sidebar .icon{
    color: var(--text-color);
    transition: var(--tran-03);
}

.sidebar .text{
    font-size: 17px;
    font-weight: 500;
    white-space: nowrap;
    opacity: 1;
}
.sidebar.close .text{
    opacity: 0;
}
/* =========================== */

.sidebar header{
    position: relative;
}

.sidebar header .image-text{
    display: flex;
    align-items: center;
}
.sidebar header .logo-text{
    display: flex;
    flex-direction: column;
}
header .image-text .name {
    margin-top: 2px;
    font-size: 18px;
    font-weight: 600;
}

header .image-text .profession{
    font-size: 16px;
    margin-top: -2px;
    display: block;
}

.sidebar header .image{
    display: flex;
    align-items: center;
    justify-content: center;
}

.sidebar header .image img{
    width: 40px;
    border-radius: 6px;
}

.sidebar header .toggle{
    position: absolute;
    top: 50%;
    right: -25px;
    transform: translateY(-50%) rotate(180deg);
    height: 25px;
    width: 25px;
    background-color: var(--primary-color);
    color: var(--sidebar-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    cursor: pointer;
    transition: var(--tran-05);
}

body.dark .sidebar header .toggle{
    color: var(--text-color);
}

.sidebar.close .toggle{
    transform: translateY(-50%) rotate(0deg);
}

.sidebar .menu{
    margin-top: 40px;
}

.sidebar li.search-box{
    border-radius: 6px;
    background-color: var(--primary-color-light);
    cursor: pointer;
    transition: var(--tran-05);
}

.sidebar li.search-box input{
    height: 100%;
    width: 100%;
    outline: none;
    border: none;
    background-color: var(--primary-color-light);
    color: var(--text-color);
    border-radius: 6px;
    font-size: 17px;
    font-weight: 500;
    transition: var(--tran-05);
}
.sidebar li a{
    list-style: none;
    height: 100%;
    background-color: transparent;
    display: flex;
    align-items: center;
    height: 100%;
    width: 100%;
    border-radius: 6px;
    text-decoration: none;
    transition: var(--tran-03);
}

.sidebar li a:hover{
    background-color: var(--primary-color);
}
.sidebar li a:hover .icon,
.sidebar li a:hover .text{
    color: var(--sidebar-color);
}
body.dark .sidebar li a:hover .icon,
body.dark .sidebar li a:hover .text{
    color: var(--text-color);
}

.sidebar .menu-bar{
    height: calc(100% - 55px);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    overflow-y: scroll;
}
.menu-bar::-webkit-scrollbar{
    display: none;
}
.sidebar .menu-bar .mode{
    border-radius: 6px;
    background-color: var(--primary-color-light);
    position: relative;
    transition: var(--tran-05);
}

.menu-bar .mode .sun-moon{
    height: 50px;
    width: 60px;
}

.mode .sun-moon i{
    position: absolute;
}
.mode .sun-moon i.sun{
    opacity: 0;
}
body.dark .mode .sun-moon i.sun{
    opacity: 1;
}
body.dark .mode .sun-moon i.moon{
    opacity: 0;
}

.menu-bar .bottom-content .toggle-switch{
    position: absolute;
    right: 0;
    height: 100%;
    min-width: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
    cursor: pointer;
}
.toggle-switch .switch{
    position: relative;
    height: 22px;
    width: 40px;
    border-radius: 25px;
    background-color: var(--toggle-color);
    transition: var(--tran-05);
}

.switch::before{
    content: '';
    position: absolute;
    height: 15px;
    width: 15px;
    border-radius: 50%;
    top: 50%;
    left: 5px;
    transform: translateY(-50%);
    background-color: var(--sidebar-color);
    transition: var(--tran-04);
}

body.dark .switch::before{
    left: 20px;
}

.home{
    position: absolute;
    top: 0;
    top: 0;
    left: 250px;
    height: 100vh;
    width: calc(100% - 250px);
    background-color: var(--body-color);
    transition: var(--tran-05);
}
.home .text{
    font-size: 30px;
    font-weight: 500;
    color: var(--text-color);
    padding: 12px 60px;
}

.sidebar.close ~ .home{
    left: 78px;
    height: 100vh;
    width: calc(100% - 78px);
}
body.dark .home .text{
    color: var(--text-color);
}

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Create a Responsive Sidebar Menu using HTML, CSS, & JavaScript with Dark and Light Mode
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