Pen Settings

CSS Base

Vendor Prefixing

Add External Stylesheets/Pens

Any URL's added here will be added as <link>s in order, and before the CSS in the editor. If you link to another Pen, it will include the CSS from that Pen. If the preprocessor matches, it will attempt to combine them before processing.

+ add another resource

You're using npm packages, so we've auto-selected Babel for you here, which we require to process imports and make it all work. If you need to use a different JavaScript preprocessor, remove the packages in the npm tab.

Add External Scripts/Pens

Any URL's added here will be added as <script>s in order, and run before the JavaScript in the editor. You can use the URL of any other Pen and it will include the JavaScript from that Pen.

+ add another resource

Use npm Packages

We can make npm packages available for you to use in your JavaScript. We use webpack to prepare them and make them available to import. We'll also process your JavaScript with Babel.

⚠️ This feature can only be used by logged in users.

Code Indentation


Save Automatically?

If active, Pens will autosave every 30 seconds after being saved once.

Auto-Updating Preview

If enabled, the preview panel updates automatically as you code. If disabled, use the "Run" button to update.

HTML Settings

Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

    <div class="src">
        <div class="dragabled">
            <div class="txt" id="txt">
                <p draggable="true">此段文字设置了属性draggable="true"</p>   
            <div class="url" id="url">
                <a href="" target="_blank">我是url:</a>
            <img class="img" id="tupian1" src="" alt="图片1" />
            <img class="img" id="tupian2" src="" alt="图片2" />
        <div id='target' class="dropabled target">Drop Here</div>
.src {
    display: flex;

.dropabled {
    flex: 1;

.txt {
    color: green;

.img {
    width: 100px;
    height: 100px;
    border: 1px solid gray;

.target {
    width: 200px;
    height: 200px;
    line-height: 200px;
    text-align: center;
    border: 1px solid gray;
    color: red;
        var dragSrc = document.getElementById('txt')
        var target = document.getElementById('target')

        dragSrc.ondragstart = handle_start
        dragSrc.ondrag = handle_drag
        dragSrc.ondragend = handle_end

        function handle_start(e) {
            // none   move copy link
            e.dataTransfer.effectAllowed = "linkMove";

        function handle_drag() {

        function handle_end() {

        target.ondragenter = handle_enter
        target.ondragover = handle_over
        target.ondragleave = handle_leave

        target.ondrop = handle_drop

        function handle_enter(e) {
            // 阻止浏览器默认行为

        function handle_over(e) {
            // 设置dropEffect属性值为move  link  copy none
            e.dataTransfer.dropEffect = "link"
            // console.log('handle_over-当元素在目的地时触发')
            // 阻止浏览器默认行为

        function handle_leave(e) {
            // 阻止浏览器默认行为
            // e.preventDefault()

        function handle_drop(e) {
          e.stopPropagation();// 不再派发事件。解决Firefox浏览器,打开新窗口的问题。
            var t =
            target.innerHTML = ''
            target.append(t + '-拖放触发的事件。')
            // 打印每种格式类型
            if (e.dataTransfer.types != null) {
                for (var i = 0; i < e.dataTransfer.types.length; i++) {
                    console.log("... types[" + i + "] = " + e.dataTransfer.types[i]);
            // 打印每个item的“kind”和“type”属性值
            if (e.dataTransfer.items != null) {
                for (var i = 0; i < e.dataTransfer.items.length; i++) {
                    console.log("... items[" + i + "].kind = " + e.dataTransfer.items[i].kind + " ; type = " + e.dataTransfer
🕑 One or more of the npm packages you are using needs to be built. You're the first person to ever need it! We're building it right now and your preview will start updating again when it's ready.