DataTransfer.getData()

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DataTransfer.getData() method retrieves drag data (as a DOMString ) for the specified type. If the drag operation does not include data, this method returns an empty string.

Example data types are text/plain and text/uri-list .

句法

dataTransfer.getData(format);

自变量

format: DOMString representing the type of data to retrieve.

返回值

DOMString: DOMString representing the drag data for the specified format . If the drag operation has no data or the operation has no data for the specified format , this method returns an empty string.

告诫

Data availability: HTML5 Drag and Drop Specification dictates a drag data store mode . This may result in unexpected behavior, being DataTransfer.getData() not returning an expected value.

范例

This example shows the use of the DataTransfer 对象的 getData() and setData() 方法。

HTML 内容

<div id="div1" ondrop="drop(event)" ondragover="allowDrop(event)">
    <span id="drag" draggable="true" ondragstart="drag(event)">drag me to the other box</span>
</div>
<div id="div2" ondrop="drop(event)" ondragover="allowDrop(event)"></div>

CSS Content

#div1, #div2 {
    width:100px;
    height:50px;
    padding:10px;
    border:1px solid #aaaaaa;
}

JavaScript Content

function allowDrop(allowdropevent) {
    allowdropevent.target.style.color = 'blue';
    allowdropevent.preventDefault();
}
function drag(dragevent) {
    dragevent.dataTransfer.setData("text", dragevent.target.id);
    dragevent.target.style.color = 'green';
}
function drop(dropevent) {
    dropevent.preventDefault();
    var data = dropevent.dataTransfer.getData("text");
    dropevent.target.appendChild(document.getElementById(data));
    document.getElementById("drag").style.color = 'black';
}

结果

规范

规范	状态	注释
HTML 实时标准 The definition of 'getData()' in that specification.	实时标准
HTML 5.1 The definition of 'getData()' in that specification.	推荐	初始定义

浏览器兼容性

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request. 更新 GitHub 上的兼容性数据

	桌面						移动
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`getData`	Chrome Yes	Edge 12	Firefox Yes	IE ?	Opera Yes	Safari Yes	WebView Android Yes	Chrome Android Yes	Firefox Android Yes	Opera Android Yes	Safari iOS No	Samsung Internet Android Yes

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句法

自变量

返回值

告诫

范例

HTML 内容

CSS Content

JavaScript Content

结果

规范

浏览器兼容性

图例

另请参阅

元数据

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