简单教程
提交运行
代码编辑器:
<style> .droptarget { float: left; width: 100px; height: 35px; margin: 15px; margin-right: 100px; padding: 10px; border: 1px solid #aaaaaa; } </style> <p>演示了如何使用 addEventListener() 方法向文档对象添加 "ondragstart", "ondrag", "ondragover" 和 "ondrop" 事件。 </p> <p>在两个矩形框中来回拖动 p 元素:</p> <div class="droptarget"> <p draggable="true" id="dragtarget">拖动我!</p> </div> <div class="droptarget"></div> <p style="clear:both;"><strong>注意:</strong>Internet Explorer 8 及更早 IE 版本或 Safari 5.1 及更早版本的浏览器不支持 drag 事件</p> <p id="demo"></p> <script> /* 拖动时触发*/ document.addEventListener("dragstart", function(event) { event.dataTransfer.setData("Text", event.target.id); }); /*拖动完成后触发*/ document.addEventListener("dragenter", function(event) { if ( event.target.className == "droptarget" ) { document.getElementById("demo").innerHTML = "进入放置区域"; event.target.style.backgroundColor = "lightblue"; } }); document.addEventListener("dragover", function(event) { event.preventDefault(); }); /*拖动完成后触发*/ document.addEventListener("dragleave", function(event) { if ( event.target.className == "droptarget" ) { document.getElementById("demo").innerHTML = "离开放置区域"; event.target.style.backgroundColor = ""; } }); document.addEventListener("drop", function(event) { event.preventDefault(); if ( event.target.className == "droptarget" ) { event.target.style.backgroundColor = ""; var data = event.dataTransfer.getData("Text"); event.target.appendChild(document.getElementById(data)); } }); </script>
运行结果: