javascriptvaish/toggle-button.html at main · vaishbil/javascriptvaish · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        body {
    background-color: white;
    color: black;
}
.dark {
    background-color: black;
    color: white;
}
       #toggle {
        border-radius: 5px;
        background-color: yellow;
        color: black;
        box-shadow: inset;
        height: 30px;
        width: 70px;
       }

    </style>
</head>
<body>
    <h2>toggle mode</h2>
    <button id="toggle">Switch</button>
    <!-- <script src="/javascript/dom5.js"></script> -->
     <script>
        let body = document.querySelector("body");
let button = document.querySelector("#toggle");
let heading = document.querySelector("h2");

button.addEventListener("click", () => {
    body.classList.toggle("dark");
    if(body.classList.contains("dark")) {
        heading.innerText = "dark mode"
    } else {
        heading.innerText = "light mode"
    }
});
     </script>
</body>
</html>