How to implement a drag-and-drop div from scratch with JavaScript?

Question

It should be a combination of CSS and JavaScript. The steps to do should be:

1. Make it on top of all other elements (which property to specify?)
2. Catch t

Answer 1

function allowDrop(ev) {
    ev.preventDefault();
}

function drag(ev) {
    ev.dataTransfer.setData("text", ev.target.id);
}

function drop(ev) {
    ev.preventDefault();
    var data = ev.dataTransfer.getData("text");
    ev.target.appendChild(document.getElementById(data));
}

.mydiv {
    float: left;
    width: 100px;
    height: 35px;
    margin: 10px;
    padding: 10px;
    border: 1px solid black;
}

Drag and Drop