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HTML 

              
                <!DOCTYPE html>
<html lang=en>
<title>Example of DataTransfer.setDragImage()</title>
<meta name="viewport" content="width=device-width">

<body>
<h1>Example of <code>DataTransfer.setDragImage()</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>
!

CSS 

              
                  div {
    margin: 0em;
    padding: 2em;
  }
  #source {
    color: blue;
    border: 1px solid black;
  }
  #target {
    border: 1px solid black;
  }
!

JS 

              
                // images-preloader
(new Image()).src = `data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACYAAAAmCAYAAACoPemuAAAAGXRFWHRTb2Z0d2FyZQBBZG9iZSBJbWFnZVJlYWR5ccllPAAABklJREFUeNqsmFtwE1UYx/97Tdqkbei91Gk6IFouYjqjBR3aQTstoM40DD4gOIO++sL4pr45+q7iu+OMyJMD1RcZAXGEBxiUm0JrKfQiDoVeSEmv2WSP3znJJpt0d1Mgpz3d3bPJnt/+v8v5TqX9X89HGMNZ6iGGdGOZP9a11Riz3bddm4n4tz991Pg+SthkDmVmoPhE2Q5bLxwruIakRVHiJnMo+9s/SZMULfTW56PRUiuWB8UKjmCrIqNfva+kYPb5vRiYi5/lnuQrsWIOkzyWWixnzjc/K505VUcgN9Ai5qwo1w7duHknFgzoUDU5Ky+z+YrbuW3sajgcjqmsCAnzSBeFLcn06NJSPBoI+CBJMmQZjw1mmmZsbGzsQ3kFUBEopxewbi3DhyujBhYXl8TnJUl67C7Lcoj6F6rb61vD5TrQ3mKiNsiy45fHZIxPSw7fUnBrphwvPJqDrikIBMposidIP5IUUr38qWdTCn2RlICztyiNDU7IOHJaxXwi/95wrBJJI454fB6qKsPv93marsC/LLBcVBZGJwd6pyMfamou9/ot1TkV7aZeZj4MTqpIJk3Mzy8gkUg8fVRaE7RUMwHG2wI999hFFeeH0+5YG2A4sC2F/isKxmYkx+gcmirDpsY5cmQm4AKBcmia5qiOK5jT/Z7Nqez5kTMamU3K2pmrduSM6hmttx5yc84imTIhKxIFw2J6MlV9CsWotzWmpxgnRQRUZsZoe8oxSE5cVvLGEmTOfyZ1RMpN4WcUE5iYmsbQv/ex7plGtDbVFwdzEtTyHRF5tg84gfE2cE+mnlNVmHO6DFuayZykGiO42bkF/HrpKt2MINxY5+r4ropZTs7hWmrYqrL/ZHzlGDfn8bNnoOkSqSYhkUwKk/9xcwij9x5AymRflin+GmpC2LO93QbmMOMgvf2ODUwEwfNNTFzzdugbPfuwT95Ioq3JFMGRjVabryUo2Y7MlMHP7tLyRMlTTn+GKzdLAaEopImUgRM/KK7YuWGFwExxfrjbwFc8AAiOA/H0cXB7Goq3P8dkx1WAm7NmbQTd69ZSVOoUlTIID8i8w/lrg7g7+RDtbesR2RCGX9eL+xiH+OWGgt7N6Tz28R5DqDIVl7JAVio5ekF1tDP3mYlEPRRpGinys+a6NfD7NJE8lxMGxiemBGTHxnVYW1dTPCqtdvSCIrL63ozDc5+zJ1QO+uUpFQvLTusqy0SnHz9cuAfVGEVrcx0O7u5MW+TaQDpJN9SiuiJA4CkyrZL3fdUrz/E0cG5IRudzZjaFTM2lo5CPOy/2toDhpVDtFhgP/hMK/XV7HKFgAJcGbguLdkY2is8ZhpFeaW1warGKdZKUOW7PU8x9bc2Dyhy5ObtaW3B95A5OX7puuRhe2vRsXtpIUtRaFQZ/zoq10rXEdiiJikFZ5gxUt6GpphpLSwaWyL/qq6vQ+WLbynqO4Kgey6/54QXDvCtaNygr2f49oWFx2cg+anZuXqQNp4Dh/iYUg5tkrDgjf4AnlK0UejDzCDqtlfVrKoVq3588h/szMceX43DyEwjmCMS8qmAtCPjD2LdzO/Z370DDmioBd/Tk75gguMLlyNPHmEsht+IhHnuF3B5VQVO4gyIyKCqMA71daCA/W6Ra7buff3NUTmZm0rOitHfXWFjFXkGUQklGizqDT1NxcFdnVrlTF6877CtTy7FCACcQV9N6po/cOa9sByZUGFTZ8mfrVDi+u7sLW9eH8Xb3K3lq8aOyvuuD+7Rp2kkLqh+MQrVIZ/xoOo8z69q0nVudkFVa2jc2GNCoDFKogNTIrG3hZqiZxCrZdi7ibNenIyFRKK1iZ+vse5S9R4YPI4Wom015mb23pwqvbinLLuq0TcsmVAsqeyzVln5n37GorAZPiFKm0LykYF9vFba1V9GuSYVPV0kxWWzt8lTKZP6SgvH2+r7+h5Ksh/KVMhHtrSSoSrHX1AmKl9tuUNaYXNL/trFUP6+5cmteGqojUkmmU0TnvrWanVJJwZhp/JgOBEoLJm2WeyoIqoKUkkXnUGlBmCcUrzZKCna2f3+/aRoxrlRfTxAvbw0Ks/EuZ0prt1RkV5E2yTEVJW6pVKK/r7fivfbNZeQ4JhnWFFGbTKbyo67Ap6zo5FDUX/tfgAEAQ3WUFGFdgUwAAAAASUVORK5CYII=`;

function dragstart_handler(ev) {
 console.log("dragStart");
 // 设置拖动的格式和数据。使用事件目标的id作为数据
 ev.dataTransfer.setData("text/plain", ev.target.id);
 // 创建一个图像并且使用它作为拖动图像
 // 请注意： 改变 "example.gif" 为一个已经存在的图片
 // 或者，一个还没有创建出来的图片，那么浏览器将会使用默认的拖动图片
 // 译者注：默认的拖动图片与拖动对象没有联系。一般是一个小型文件图标
 var img = new Image(); 
 // img.src = 'example.gif'; 
 img.src = `data:image/png;base64,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`;
 ev.dataTransfer.setDragImage(img, 10, 10);
}

function dragover_handler(ev) {
 console.log("dragOver");
 ev.preventDefault();
}

function drop_handler(ev) {
 console.log("Drop");
 ev.preventDefault();
 // 获取拖放目标的id数据
 var data = ev.dataTransfer.getData("text");
 ev.target.appendChild(document.getElementById(data));
}
!
999px

Console