dragover vs dragenter events of HTML5 drag & drop - html

Question

I want to know the difference of dragover and dragenter events of HTML5 drag &drop.
I'm not clear about the difference.

Answer 1

The dragenter event happens at the moment you drag something in to the target element, and then it stops.
The dragover event happens during the time you are dragging something until you drop it.
Look here:
$('.dropzone').on("dragover", function (event) {
console.log('dragover');
});
$('.dropzone').on("dragenter", function (event) {
console.log('dragenter');
});
Now see the console:
As you can see the dragenter happen once (when you drag element in to the target).
But the dragover event happen every few hundred milliseconds.
The same difference exist between drag and dragstart, dragstart happen once but drag happen every few hundred milliseconds.

Answer 2

Based on the dragenter and dragover MDN doc...
dragover
The dragover event is fired when an element or text selection is being
dragged over a valid drop target (every few hundred milliseconds).
dragenter
The dragenter event is fired when a dragged element or text selection
enters a valid drop target.
The dragover is triggered after a small delay (every 350 ms, I think) while the cursor stays over the element.

Answer 3

dragenter:
dragenter event is fires only when while dragging an draggable element, the cursor enters the area of a DOM element which has the ondragenter event attached to it.
dragover:
On the other hand, dragover event is fired "constantly" while dragging a draggable element, and the cursor happens to be to be on the screen inside an DOM element's area, where this DOM element has the ondragover event attached to it.
The difference is that (while dragging) when the cursor enters a drop-zone, dragover is constantly fired (on mouse move) while
dragenter is only fired once, when the cursor has "entered"
DEMO:
function dragover(e) {
console.log("drag over")
}
function dragenter(e) {
console.log("drag enter!!!")
}
#target{
width: 200px;
height: 200px;
background: lightyellow;
border: 1px solid gold;
}
div[draggable]{
width: 60px;
height: 60px;
background: red;
}
<div draggable="true">Drag Me</div>
<div id="target" ondragover="dragover(event)" ondragenter="dragenter(event)">Drop Zone</div>