---
title: FormData.keys()
slug: Web/API/FormData/keys
translation_of: Web/API/FormData/keys
---
<p>{{APIRef("XMLHttpRequest")}}</p>

<p><code><strong>FormData.keys()</strong></code> 메서드는 이 객체에 포함된 모든 키를 통과하는 {{jsxref("Iteration_protocols",'iterator')}} 를 반환합니다. 키는 {{domxref("USVString")}} 객체입니다.</p>

<div class="note">
<p><strong>메모</strong>: 이 메서드는 웹워커<a href="/en-US/docs/Web/API/Web_Workers_API">(Web Workers)</a>에서도 사용할 수 있습니다.</p>
</div>

<h2 id="Syntax">Syntax</h2>

<pre class="syntaxbox">formData.keys();</pre>

<h3 id="Return_value">Return value</h3>

<p>{{jsxref("Iteration_protocols","iterator")}}를 반환합니다.</p>

<h2 id="Example">Example</h2>

<pre class="brush: js;highlight:[7]">// Create a test FormData object
var formData = new FormData();
formData.append('key1', 'value1');
formData.append('key2', 'value2');

// Display the keys
for (var key of formData.keys()) {
   console.log(key);
}
</pre>

<p>결과는 다음과 같습니다:</p>

<pre>key1
key2</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('XMLHttpRequest','#dom-formdata','keys() (as iterator&lt;&gt;)')}}</td>
   <td>{{Spec2('XMLHttpRequest')}}</td>
   <td>Initial definition</td>
  </tr>
 </tbody>
</table>

<h2 id="Browser_compatibility">Browser compatibility</h2>



<p>{{Compat("api.FormData.keys")}}</p>

<h2 id="See_also">See also</h2>

<ul>
 <li>{{domxref("XMLHTTPRequest")}}</li>
 <li><a href="/en-US/docs/DOM/XMLHttpRequest/Using_XMLHttpRequest" title="Using XMLHttpRequest">Using XMLHttpRequest</a></li>
 <li><a href="/en-US/docs/DOM/XMLHttpRequest/FormData/Using_FormData_Objects" title="DOM/XMLHttpRequest/FormData/Using_FormData_objects">Using FormData objects</a></li>
 <li>{{HTMLElement("Form")}}</li>
</ul>