Question

我无法让IE11兑现我在drop zone元素上注册的dragOver，dragLeave和drop事件处理程序。

可拖动项目上的dragStart处理程序运行正常，放置目标上的mouseover和mouseout处理程序也是如此 - 只是不是拖动和放置丢弃目标上的处理程序。

仅供参考，应该发生的事情是，当您

时，您应该在F12工具控制台中看到输出

开始拖动，
拖动放置目标，
拖出放置目标，然后
放下掉落目标。

此外，您在拖动放置目标时会看到红色轮廓，并且在拖出放置目标时会消失。

<!DOCTYPE html>
<html>
<head>
<title>Drag &amp; Drop</title>
<style>
  *[draggable=true] { cursor: move; }
  .activated { outline: 1px solid red; }
</style>
</head>
<body>
<div><a href="#" draggable="true">Lorem ipsum</a></div>
<div><a href="#" draggable="true">dolor sit amet</a></div>
<div><a href="#" draggable="true">consectetur adipiscing elit</a></div>
<div><a href="#" draggable="true">Curabitur non semper leo</a></div>
<div><a href="#" draggable="true">Pellentesque habitant morbi </a></div>
<div><a href="#" draggable="true">tristique senectus</a></div>

<p class="drop-zone">
  Drop Here
</p>

<script>
  window.onload = function () {
    function findAll(selector) {
      const nodeList = document.querySelectorAll(selector);
      const nodes = Array.prototype.slice.call(nodeList);
      return nodes;      
    }

    findAll('*[draggable=true]').forEach(function (node) {
      node.addEventListener('dragstart', function (event) {
        const data = node.childNodes[0].nodeValue;
        event.dataTransfer.effectAllowed = 'all';
        event.dataTransfer.setData('Text', data);

        console.log('Drag start: "' + data + '"');
        return false;
      });
    });

    findAll('.drop-zone').forEach(function (node) {
      node.addEventListener('mouseover', function (event) {
        console.log('Mouse over');
        node.style.background = 'pink';
      });
      node.addEventListener('mouseout', function (event) {
        console.log('Mouse out');
        node.style.background = '';
      });

      node.addEventListener('dragover', function (event) {
        if (event.preventDefault) event.preventDefault();
        node.classList.add('activated');

        const data = node.childNodes[0].nodeValue;
        console.log('Drag over: "' + data + '"');
        return false;
      });
      node.addEventListener('dragleave', function (event) {
        if (event.preventDefault) event.preventDefault();
        node.classList.remove('activated');

        const data = node.childNodes[0].nodeValue;
        console.log('Drag leave: "' + data + '"');
        return false;
      });
      node.addEventListener('drop', function (event) {
        if (event.preventDefault) event.preventDefault();
        node.classList.remove('activated');
        const text = node.childNodes[0].nodeValue;
        const data = event.dataTransfer.getData('Text');

        console.log('Dropped on: "' + text + '"');
        console.log('  data: "' + data + '"');
        return false;
      });
    });
  };
</script>
</body>
</html>

有什么建议吗？

Answer 1

直到我在IE11中为dragenter添加了一个监听器，才能让我开火。所以，试一试。

  node.addEventListener('dragenter', function (event) {
    if (event.preventDefault) event.preventDefault();

    const data = node.childNodes[0].nodeValue;
    console.log('Drag enter: "' + data + '"');
    return false;
  });

IE11：Drag＆amp;不工作

1 个答案: