
This is the simplest JavaScript implementation of the dark mode that uses classList to toggle between dark theme and light theme on the webpage.
How to use it:
Create the dark theme in the CSS.
.dark {
background-color: black;
color: white;
}The main function to toggle the dark mode.
function darkxlight() {
var element = document.getElementById("darkxlight");
element.classList.toggle("dark");
}Add the darkxlight ID to the body tag.
<body id="darkxlight"> ... </body>
Bind the function to the toggle button. That’s it.
<button onclick="darkxlight()">? Dark/Light</button>







