console 命令行工具 X clear

console

function drag_handler(ev) {
    // console.log("Drag");
}

function dragstart_handler(ev) {
    console.log("dragStart");
    ev.dataTransfer.setData("text", ev.target.id);
    console.log(ev.target.id)
}

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

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

<!DOCTYPE html>
<html lang=en>
<title>Examples of using the ondrag Global Event Attribute</title>
<meta content="width=device-width">
<style>
</style>
</head>

<body>
	<h1>Examples of <code>ondrag</code>, <code>ondrop</code>, <code>ondragstart</code>, <code>ondragover</code></h1>
 <div class="source">
   <p id="source" 
      ondrag="drag_handler(event);" 
      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>

div {
    margin: 0em;
    padding: 2em;
}

#source {
    color: blue;
    border: 1px solid black;
}

#target {
    border: 1px solid black;
}