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
").
dataTransfer.types;
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
文件
.
This example shows the use of the
类型
and
项
特性。
<!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>
| 规范 | 状态 | 注释 |
|---|---|---|
|
HTML 实时标准
The definition of 'types' in that specification. |
实时标准 | |
|
HTML 5.1
The definition of 'types' in that specification. |
推荐 | 初始定义 |
| 桌面 | 移动 | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
类型
|
Chrome Yes | Edge 12 | Firefox Yes |
IE
10
|
Opera
Yes
|
Safari Yes | WebView Android Yes | Chrome Android Yes | Firefox Android Yes | Opera Android Yes | Safari iOS No | Samsung Internet Android Yes |
完整支持
不支持
见实现注意事项。
DataTransfer