GlobalEventHandlers.ondragleave

这篇翻译不完整。请帮忙从英语翻译这篇文章

A global event handler for the dragleave event.

Syntax

var dragleaveHandler = targetElement.ondragleave;

Return value

dragleaveHandler
The dragleave event handler for element targetElement.

Example

This example demonstrates using the ondragleave attribute handler to set an element's dragleave event handler.

<!DOCTYPE html>
<html lang=en>
<title>Examples of using the Drag and Drop 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 dragstart_handler(ev) {
 console.log("dragStart");
 // Change the source element's border to signify drag has started
 ev.currentTarget.style.border = "dashed";
 ev.dataTransfer.setData("text", ev.target.id);
}

function dragover_handler(ev) {
 console.log("dragOver");
 // Change the target element's background color to signify a drag over event
 // has occurred
 ev.currentTarget.style.background = "lightblue";
 ev.preventDefault();
}

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

function dragenter_handler(ev) {
 console.log("dragEnter");
 // Change the source element's background color for enter events 
 ev.currentTarget.style.background = "yellow";
}

function dragleave_handler(ev) {
 console.log("dragLeave");
 // Change the source element's background color back to white
 ev.currentTarget.style.background = "white";
}

function dragend_handler(ev) {
 console.log("dragEnd");
 // Change the target element's background color to visually indicate 
 // the drag ended.
 var el=document.getElementById("target");
 el.style.background = "pink";
}

function dragexit_handler(ev) {
 console.log("dragExit");
 // Change the source element's background color back to green to signify a dragexit event
 ev.currentTarget.style.background = "green";
}

function init() {
 // Set handlers for the source's enter/leave/end/exit events
 var el=document.getElementById("source");
 el.ondragenter = dragenter_handler;
 el.ondragleave = dragleave_handler;
 el.ondragend = dragend_handler;
 el.ondragexit = dragexit_handler;
}
</script>
<body onload="init();">
<h1>Examples of <code>ondragenter</code>, <code>ondragleave</code>, <code>ondragend</code>, <code>ondragexit</code></h1>
 <div>
   <p id="source" 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
HTML Living Standard
ondragleave
Living Standard  
HTML 5.1
ondragleave
Recommendation 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 未实现 未实现 未实现 未实现 未实现 10 未实现 未实现

See also

文档标签和贡献者

 此页面的贡献者: xgqfrms-GitHub
 最后编辑者: xgqfrms-GitHub,