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DataTransfer.types - Web APIs 编辑

The DataTransfer.types read-only property returns an array of the drag data formats (as strings) that were set in the dragstart event. The order of the formats is the same order as the data included in the drag operation.

The formats are Unicode strings giving the type or format of the data, generally given by a MIME type. Some values that are not MIME types are special-cased for legacy reasons (for example "text").

Syntax

dataTransfer.types;

Return value

An array of the data formats used in the drag operation. Each format is string. If the drag operation included no data, this list will be empty. If any files are included in the drag operation, then one of the types will be the string Files.

Example

This example shows the use of the types and items properties.

<!DOCTYPE html>
<html lang=en>
<title>Examples of DataTransfer.{types,items} properties</title>
<meta content="width=device-width">
<style>
  div {
    margin: 0em;
    padding: 2em;
  }
  #target {
    border: 1px solid black;
  }
</style>
<script>
function dragstart_handler(ev) {
 console.log("dragStart: target.id = " + ev.target.id);
 // Add this element's id to the drag payload so the drop handler will
 // know which element to add to its tree
 ev.dataTransfer.setData("text/plain", ev.target.id);
 ev.dataTransfer.effectAllowed = "move";
}

function drop_handler(ev) {
 console.log("drop: target.id = " + ev.target.id);
 ev.preventDefault();
 // Get the id of the target and add the moved element to the target's DOM
 var data = ev.dataTransfer.getData("text");
 ev.target.appendChild(document.getElementById(data));
 // Print each format type
 if (ev.dataTransfer.types != null) {
   for (var i=0; i < ev.dataTransfer.types.length; i++) {
     console.log("... types[" + i + "] = " + ev.dataTransfer.types[i]);
   }
 }
 // Print each item's "kind" and "type"
 if (ev.dataTransfer.items != null) {
   for (var i=0; i < ev.dataTransfer.items.length; i++) {
     console.log("... items[" + i + "].kind = " + ev.dataTransfer.items[i].kind + " ; type = " + ev.dataTransfer.items[i].type);
   }
 }
}

function dragover_handler(ev) {
 console.log("dragOver");
 ev.preventDefault();
 // Set the dropEffect to move
 ev.dataTransfer.dropEffect = "move"
}
</script>
<body>
<h1>Examples of <code>DataTransfer</code>.{<code>types</code>, <code>items</code>} properties</h1>
 <ul>
   <li id="i1" ondragstart="dragstart_handler(event);" draggable="true">Drag Item 1 to the Drop Zone</li>
   <li id="i2" ondragstart="dragstart_handler(event);" draggable="true">Drag Item 2 to the Drop Zone</li>
 </ul>
 <div id="target" ondrop="drop_handler(event);" ondragover="dragover_handler(event);">Drop Zone</div>
</body>
</html>

Specifications

Specification	Status	Comment
HTML Living Standard The definition of 'types' in that specification.	Living Standard
HTML 5.1 The definition of 'types' in that specification.	Recommendation	Initial definition

Browser compatibility

BCD tables only load in the browser

DataTransfer.types - Web APIs 编辑

Syntax

Return value

Example

Specifications

Browser compatibility

See also

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友情链接

DataTransfer.types - Web APIs 编辑

Syntax

Return value

Example

Specifications

Browser compatibility

See also

如果你对这篇内容有疑问，欢迎到本站社区发帖提问 参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。

发布评论

词条统计

友情链接

如果你对这篇内容有疑问，欢迎到本站社区发帖提问参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。