Dark mode has become an essential feature in modern web design, providing users with a visually comfortable experience, especially in low-light environments. In this blog post, we’ll walk through a simple yet effective dark mode toggle using HTML, CSS, and JavaScript.
Dark mode reduces eye strain, saves battery life on OLED screens, and enhances the overall user experience. Many popular websites and apps now offer dark mode options, making it a must-have feature for any website.
We’ll be creating a simple web page that includes a dark mode switch. The implementation involves:
We begin with a basic HTML document that contains a toggle switch for dark mode and some sample text to observe the effect.
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Dark Mode Toggle</title>
<link rel="stylesheet" href="theme-switcher.css">
<script defer src="theme-switcher.js"></script>
</head>
<body>
<div class="theme-toggle">
<span>Light</span>
<label class="switch">
<input type="checkbox" id="theme-switcher">
<span class="slider round"></span>
</label>
<span>Dark</span>
</div>
<div class="container">
<h1>Welcome to Dark Mode Switcher</h1>
<p>Try switching to dark mode to see the effect!</p>
</div>
</body>
</html>2. Styling the Dark Mode with CSS
We use CSS to define styles for both light and dark modes, ensuring smooth transitions when toggling between them.
body {
font-family: Arial, sans-serif;
transition: background 0.3s, color 0.3s;
padding: 20px;
}
.dark-mode {
background-color: #121212;
color: #ffffff;
}
.switch {
position: relative;
display: inline-block;
width: 50px;
height: 24px;
}
.slider {
position: absolute;
cursor: pointer;
top: 0;
left: 0;
right: 0;
bottom: 0;
background-color: #ccc;
transition: 0.4s;
border-radius: 34px;
}
.dark-mode .slider {
background-color: #555;
}Finally, we add JavaScript to handle the toggle functionality and store the user’s preference.
document.addEventListener("DOMContentLoaded", function() {
const themeSwitcher = document.getElementById("theme-switcher");
const currentTheme = localStorage.getItem("theme") || "light";
if (currentTheme === "dark") {
document.body.classList.add("dark-mode");
themeSwitcher.checked = true;
}
themeSwitcher.addEventListener("change", function() {
if (this.checked) {
document.body.classList.add("dark-mode");
localStorage.setItem("theme", "dark");
} else {
document.body.classList.remove("dark-mode");
localStorage.setItem("theme", "light");
}
});
});With just a few lines of HTML, CSS, and JavaScript, we’ve successfully implemented a dark mode toggle for a webpage. This simple approach enhances user experience and adds a modern touch to any website. Try it out and customize it to fit your needs!
Working Codepen Demo
See the Pen Auto Dark Mode by Mossawir (@mossawir) on CodePen.
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