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---
title: DataTransferItem.getAsString()
slug: Web/API/DataTransferItem/getAsString
translation_of: Web/API/DataTransferItem/getAsString
---
<div>{{APIRef("HTML Drag and Drop API")}}</div>
<p> <strong><code>DataTransferItem.getAsString()</code></strong> 当DataTransferItem对象的kind属性是一个普通Unicode字符串时，该方法会用 DataTransferItem对象的kind属性作为入参来执行传入的回调函数 (i.e. <code>kind</code> is <code>string</code>).</p>
<h2 id="示例">示例</h2>
<pre class="syntaxbox notranslate"><em>dataTransferItem</em>.getAsString(callback);
</pre>
<h3 id="Parameters">Parameters</h3>
<dl>
<dt><code>callback</code></dt>
<dd>A callback function that has access to the {{domxref("DataTransferItem","data transfer item's")}} string data. See <a href="#callback">Callback</a> below for details.</dd>
</dl>
<h3 id="Return_value">Return value</h3>
<p>{{jsxref("undefined")}}</p>
<h2 id="Callback">Callback</h2>
<p>The callback parameter is a callback function which accepts one parameter:</p>
<dl>
<dt>{{domxref("DOMString")}}</dt>
<dd>The drag data item's string data.</dd>
</dl>
<p>The callback return value is <code>undefined</code>.</p>
<h2 id="Example">Example</h2>
<p>This example shows the use of the <code>getAsString()</code> method as an <em>inline function</em> in a {{event("drop")}} event handler.</p>
<pre class="brush: js notranslate">function drop_handler(ev) {
console.log("Drop");
ev.preventDefault();
var data = ev.dataTransfer.items;
for (var i = 0; i < data.length; i += 1) {
if ((data[i].kind == 'string') &&
(data[i].type.match('^text/plain'))) {
// This item is the target node
data[i].getAsString(function (s){
ev.target.appendChild(document.getElementById(s));
});
} else if ((data[i].kind == 'string') &&
(data[i].type.match('^text/html'))) {
// Drag data item is HTML
console.log("... Drop: HTML");
} else if ((data[i].kind == 'string') &&
(data[i].type.match('^text/uri-list'))) {
// Drag data item is URI
console.log("... Drop: URI");
} else if ((data[i].kind == 'file') &&
(data[i].type.match('^image/'))) {
// Drag data item is an image file
var f = data[i].getAsFile();
console.log("... Drop: File ");
}
}
}
</pre>
<h2 id="Specifications">Specifications</h2>
<table class="standard-table">
<tbody>
<tr>
<th scope="col">Specification</th>
<th scope="col">Status</th>
<th scope="col">Comment</th>
</tr>
<tr>
<td>{{SpecName('HTML WHATWG', 'interaction.html#dom-datatransferitem-getasstring','getAsString()')}}</td>
<td>{{Spec2('HTML WHATWG')}}</td>
<td>Initial definition.</td>
</tr>
<tr>
<td>{{SpecName('HTML5.1', 'editing.html#dom-datatransferitem-getasstring','getAsString()')}}</td>
<td>{{Spec2('HTML5.1')}}</td>
<td>Snapshot fo HTML WHATWG document</td>
</tr>
</tbody>
</table>
<h2 id="Browser_compatibility">Browser compatibility</h2>
<p>{{Compat("api.DataTransferItem.getAsString")}}</p>
<h2 id="See_also">See also</h2>
<ul>
<li>{{domxref("DataTransfer.getData()")}}</li>
</ul>
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