Cambiando la clase de un div usando Javascript

 In Javascript
[include slug="includes/ad1"]

Aqui les traigo un ejemplo de como usar solo Javascript para para cambiar la clase de div, usando una accion de un boton.

En el evento onclick() se acciona el Javascript, se puede usar cualquiera de los demas eventos

<!DOCTYPE html>
<html lang="en">
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
        .caja1 {
            background-color: red;
            width: 300px;
            height: 300px;
        .caja2 {
            background-color: rgb(37, 88, 153);
            width: 300px;
            height: 300px;

        function cambiarClase() {
           var elemento =  document.getElementById("caja");

           if (elemento.className== "caja1") {
                elemento.className = "caja2"
           } else {
                elemento.className = "caja1"

    <button onclick="cambiarClase()">Cambiar Clase</button>

    <div id="caja" class="caja1">




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