标签：span fun hot ble query tran func case contains
<!DOCTYPE html> <html> <head> <style> .item img { width:200px; height:200px; } .item { margin-bottom: 20px; } </style> </head> <body> <div id="drag-wrap"> <div class="item" id="wrap1"> <img src="http://photos.tuchong.com/38538/f/6864556.jpg" id="img1" draggable="true" /> </div> <div class="item" id="wrap2"> <img src="http://photos.tuchong.com/349669/f/6695960.jpg" id="img2" draggable="true" /> </div> <div class="item" id="wrap3"> <img src="http://photos.tuchong.com/349669/f/6683901.jpg" id="img3" draggable="true" /> </div> <div class="item" id="wrap4"> <img src="http://photos.tuchong.com/349669/f/5121337.jpg" id="img4" draggable="true" /> </div> </div> <script> const dragCon = document.getElementById(‘drag-wrap‘); dragCon.addEventListener(‘dragstart‘, startDrag, false); /** * 这里一定要阻止dragover的默认行为，不然触发不了drop */ dragCon.addEventListener(‘dragover‘, function (e) { e.preventDefault(); }, false); dragCon.addEventListener(‘drop‘, exchangeElement, false); function startDrag(e) { console.log(e) e.dataTransfer.setData(‘Text‘, e.target.id + ‘;‘ + e.target.parentElement.id); } function exchangeElement(e) { e.preventDefault(); const el = e.target; let PE, //要插入位置的父元素 CE; //需要交换的元素 if (el.tagName.toLowerCase() !== ‘div‘) { PE = el.parentElement; CE = el; } else { PE = el; CE = el.querySelector(‘img‘); } /** * 判断不在控制范围内 */ if (!PE.classList.contains(‘item‘)) { return; } const data = e.dataTransfer.getData(‘Text‘).split(‘;‘); //交换元素 document.getElementById(data[1]).appendChild(CE); PE.appendChild(document.getElementById(data[0])); } </script> </body> </html>
标签：span fun hot ble query tran func case contains
原文地址：https://www.cnblogs.com/xybs/p/14333308.html
