此文件需要技術審查。看看您能幫什麼忙。
我們的志工尚未將此文章翻譯為 正體中文 (繁體) 版本。加入我們，幫忙翻譯！
A global event handler for the dragover event.
Syntax
var dragoverHandler = targetElement.ondragover;
Return value
dragoverHandler- The
dragoverevent handler for elementtargetElement.
Example
This example demonstrates using the ondragover attribute handler to set an element's dragover event handler.
<!DOCTYPE html>
<html lang=en>
<title>Examples of using the ondrag Global Event Attribute</title>
<meta content="width=device-width">
<style>
div {
margin: 0em;
padding: 2em;
}
#source {
color: blue;
border: 1px solid black;
}
#target {
border: 1px solid black;
}
</style>
</head>
<script>
function drag_handler(ev) {
console.log("Drag");
}
function dragstart_handler(ev) {
console.log("dragStart");
ev.dataTransfer.setData("text", ev.target.id);
}
function drop_handler(ev) {
console.log("Drop");
ev.currentTarget.style.background = "lightyellow";
ev.preventDefault();
var data = ev.dataTransfer.getData("text");
ev.target.appendChild(document.getElementById(data));
}
function dragover_handler(ev) {
console.log("dragOver");
ev.preventDefault();
}
</script>
<body>
<h1>Examples of <code>ondrag</code>, <code>ondrop</code>, <code>ondragstart</code>, <code>ondragover</code></h1>
<div>
<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>
Specifications
| Specification | Status | Comment |
|---|---|---|
| WHATWG HTML Living Standard The definition of 'ondragover' in that specification. |
Living Standard | |
| HTML5.1 The definition of 'ondragover' in that specification. |
Working Draft | Initial definition |
Browser compatibility
| Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari (WebKit) |
|---|---|---|---|---|---|
| Basic support | 4 | 3.5 (1.9.1) | 10 | 12 | 3.1 |
| Feature | Android | Android Webview | Chrome for Android | Firefox Mobile (Gecko) | Firefox OS | IE Mobile | Opera Mobile | Safari Mobile |
|---|---|---|---|---|---|---|---|---|
| Basic support | Not supported | Not supported | Not supported | Not supported | Not supported | 10 | Not supported | Not supported |