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Convert ondrop static example to live sample #17644

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merged 3 commits into from Jun 26, 2022
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Convert ondrop static example to live sample #17644

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Convert ondrop static example to live sample
AnilSeervi Jun 25, 2022
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Dropped -> Drop
AnilSeervi Jun 26, 2022
de90246
Keep consistent logs
AnilSeervi Jun 26, 2022
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146 changes: 100 additions & 46 deletions files/en-us/web/api/globaleventhandlers/ondrop/index.md
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Expand Up @@ -17,74 +17,128 @@ event.
## Syntax

```js
const dropHandler = targetElement.ondrop;
targetElement.ondrop = functionRef;
```

### Return value
### Value

- `dropHandler`
- `functionRef`
- : The _drop_ event handler for element `targetElement`.

## Example

This example demonstrates the use of the
{{domxref("GlobalEventHandlers.ondrop","ondrop")}} attribute to define an element's
{{domxref("HTMLElement/drop_event", "drop")}} event handler.
This example demonstrates using the
{{domxref("GlobalEventHandlers.ondrop","ondrop")}} global event handler to set
an element's `ondrop` event handler.

```js
<!DOCTYPE html>
<html lang=en>
<title>Examples of using the ondrag Global Event Attribute</title>
<meta content="width=device-width">
<style>
div {
margin: 0em;
### HTML

```html
<div>
<p id="source" draggable="true">
Select this element, drag it to the Drop Zone and then release the selection to move the element.
</p>
</div>
<div id="target">Drop Zone</div>

<textarea readonly id="event-log"></textarea>
<button id="reload">Reload</button>
```

### CSS

```css
div, #event-log {
margin: 1em;
}

#source, #target {
padding: 2em;
}
#source {
color: blue;
border: 1px solid black;
}
#target {
border: 1px solid black;
}
</style>
</head>
<script>
function drag_handler(ev) {
console.log("Drag");
}

#source {
color: blue;
}

#event-log {
width: 25rem;
height: 8rem;
margin-bottom: 0;
padding: .2rem;
}
```

### JavaScript

```js
const source = document.getElementById("source");
const target = document.getElementById("target");
const event_log = document.getElementById("event-log");

function dragstart_handler(ev) {
console.log("dragStart");
ev.dataTransfer.setData("text", ev.target.id);
event_log.textContent += "dragStart\n";
// Change the source element's background color to signify drag has started
ev.currentTarget.style.background = "lightgreen";
ev.dataTransfer.setData("text", ev.target.id);
}

function dragover_handler(ev) {
event_log.textContent += "dragOver\n";
// Change the target element's border to signify a drag over event
// has occurred
ev.currentTarget.style.background = "lightblue";
ev.preventDefault();
}

function drop_handler(ev) {
console.log("Drop");
ev.currentTarget.style.background = "lightyellow";
event_log.textContent += "drop\n";
ev.preventDefault();
const data = ev.dataTransfer.getData("text");
ev.target.appendChild(document.getElementById(data));
target.style.background = "pink";
}

ev.preventDefault();
const data = ev.dataTransfer.getData("text");
ev.target.appendChild(document.getElementById(data));
function dragenter_handler(ev) {
event_log.textContent += "dragEnter\n";
// Change the source element's background color for enter events
ev.currentTarget.style.background = "yellow";
}

function dragover_handler(ev) {
console.log("dragOver");
ev.preventDefault();
function dragleave_handler(ev) {
event_log.textContent += "dragLeave\n";
// Change the source element's border back to white
ev.currentTarget.style.background = "white";
}

function dragend_handler(ev) {
event_log.textContent += "dragEnd\n";
// Change the target element's background color to visually indicate
// the drag ended.
ev.currentTarget.style.background = "pink";
}
</script>
<body>
<h1>Examples of <code>ondrag</code>, <code>ondrop</code>, <code>ondragstart</code>, <code>ondragover</code></h1>
<div class="source">
<p id="source" ondrag="drag_handler(event);" ondragstart="dragstart_handler(event);" draggable="true">
Select this element, drag it to the Drop Zone and then release the selection to move the element.</p>
</div>
<div id="target" ondrop="drop_handler(event);" ondragover="dragover_handler(event);">Drop Zone</div>
</body>
</html>

// Set handlers for the source's drag - start/enter/leave/end events
source.ondragstart = dragstart_handler;
source.ondragend = dragend_handler;

// Set handlers for the target's drop and dragover events
target.ondragleave = dragleave_handler;
target.ondragenter = dragenter_handler;
target.ondragover = dragover_handler;
target.ondrop = drop_handler;

// Set click event listener on button to reload the example
const button = document.getElementById("reload");
button.addEventListener("click", () => {
document.location.reload();
});
```

### Result

{{ EmbedLiveSample('Example', '100', '450') }}

## Specifications

{{Specifications}}
Expand Down