Crear dinamicamente divs in Javascript

//create a div element
const div = document.createElement('div');

//add a class to the div
div.classList.add('my-div');

//add an id to the div
div.id = 'my-div';

//add a text node to the div
div.appendChild(document.createTextNode('Hello World'));

//add the div to the body
document.body.appendChild(div);