当一个元素或是选中的文字被拖拽释放到一个有效的释放目标位置时，drop 事件被抛出。
| Property | Type | Description |
|---|
target 只读 | EventTarget | The element that was underneath the element being dragged. |
type 只读 | DOMString | The type of event. |
bubbles 只读 | Boolean | Whether the event normally bubbles or not |
cancelable 只读 | Boolean | Whether the event is cancellable or not? |
view 只读 | WindowProxy | document.defaultView (window of the document) |
detail 只读 | long (float) | 0. |
dataTransfer | DataTransfer | The data that underlies a drag-and-drop operation, known as the drag data store. Protected mode. |
currentTarget 只读 | EventTarget | The node that had the event listener attached. |
relatedTarget 只读 | EventTarget | For mouseover, mouseout, mouseenter and mouseleave events: the target of the complementary event (the mouseleave target in the case of a mouseenter event). null otherwise. |
screenX 只读 | long | The X coordinate of the mouse pointer in global (screen) coordinates. |
screenY 只读 | long | The Y coordinate of the mouse pointer in global (screen) coordinates. |
clientX 只读 | long | The X coordinate of the mouse pointer in local (DOM content) coordinates. |
clientY 只读 | long | The Y coordinate of the mouse pointer in local (DOM content) coordinates. |
button 只读 | unsigned short | The button number that was pressed when the mouse event was fired: Left button=0, middle button=1 (if present), right button=2. For mice configured for left handed use in which the button actions are reversed the values are instead read from right to left. |
buttons 只读 | unsigned short | The buttons being pressed when the mouse event was fired: Left button=1, Right button=2, Middle (wheel) button=4, 4th button (typically, "Browser Back" button)=8, 5th button (typically, "Browser Forward" button)=16. If two or more buttons are pressed, returns the logical sum of the values. E.g., if Left button and Right button are pressed, returns 3 (=1 | 2). More info. |
mozPressure 只读 | float | The amount of pressure applied to a touch or tabdevice when generating the event; this value ranges between 0.0 (minimum pressure) and 1.0 (maximum pressure). |
ctrlKey 只读 | boolean | true if the control key was down when the event was fired. false otherwise. |
shiftKey 只读 | boolean | true if the shift key was down when the event was fired. false otherwise. |
altKey 只读 | boolean | true if the alt key was down when the event was fired. false otherwise. |
metaKey 只读 | boolean | true if the meta key was down when the event was fired. false otherwise. |
<div class="dropzone">
<div id="draggable" draggable="true" ondragstart="event.dataTransfer.setData('text/plain',null)">
This div is draggable
</div>
</div>
<div class="dropzone"></div>
<div class="dropzone"></div>
<div class="dropzone"></div>
#draggable {
width: 200px;
height: 20px;
text-align: center;
background: white;
}
.dropzone {
width: 200px;
height: 20px;
background: blueviolet;
margin-bottom: 10px;
padding: 10px;
}
var dragged;
/* 可拖动的目标元素会触发事件 */
document.addEventListener("drag", function( event ) {
}, false);
document.addEventListener("dragstart", function( event ) {
// 保存拖动元素的引用(ref.)
dragged = event.target;
// 使其半透明
event.target.style.opacity = .5;
}, false);
document.addEventListener("dragend", function( event ) {
// 重置透明度
event.target.style.opacity = "";
}, false);
/* 放下目标节点时触发事件 */
document.addEventListener("dragover", function( event ) {
// 阻止默认动作
event.preventDefault();
}, false);
document.addEventListener("dragenter", function( event ) {
// 当可拖动的元素进入可放置的目标高亮目标节点
if ( event.target.className == "dropzone" ) {
event.target.style.background = "purple";
}
}, false);
document.addEventListener("dragleave", function( event ) {
// 当拖动元素离开可放置目标节点，重置其背景
if ( event.target.className == "dropzone" ) {
event.target.style.background = "";
}
}, false);
document.addEventListener("drop", function( event ) {
// 阻止默认动作（如打开一些元素的链接）
event.preventDefault();
// 移动拖动的元素到所选择的放置目标节点
if ( event.target.className == "dropzone" ) {
event.target.style.background = "";
dragged.parentNode.removeChild( dragged );
event.target.appendChild( dragged );
}
}, false);
We're converting our compatibility data into a machine-readable JSON format. This compatibility table still uses the old format, because we haven't yet converted the data it contains.
Find out how you can help! | 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 | 未实现 | 未实现 | 未实现 | 未实现 | 未实现 | 10 | 未实现 | 未实现 |
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