Returns the number of frames (either {{HTMLElement("frame")}} or {{HTMLElement("iframe")}} elements) in the window.
framesCount = window.length;
framesCount is the number of frames.if (window.length) {
// this is a document with subframes
}
| Specification | Status | Comment |
|---|---|---|
| {{SpecName('HTML WHATWG','browsers.html#dom-length','Window.length')}} | {{Spec2('HTML WHATWG')}} |
<div>{{ ApiRef() }}</div>
<h2 id="Summary" name="Summary">Summary</h2>
<p>Returns the number of frames (either {{HTMLElement("frame")}} or {{HTMLElement("iframe")}} elements) in the window.</p>
<h2 id="Syntax" name="Syntax">Syntax</h2>
<pre class="syntaxbox">
<em>framesCount</em> = window.length;
</pre>
<ul>
<li><code>framesCount</code> is the number of frames.</li>
</ul>
<h2 id="Example" name="Example">Example</h2>
<pre class="brush:js">
if (window.length) {
// this is a document with subframes
}</pre>
<h2 id="Specification" name="Specification">Specification</h2>
<table class="spectable 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','browsers.html#dom-length','Window.length')}}</td>
<td>{{Spec2('HTML WHATWG')}}</td>
<td> </td>
</tr>
</tbody>
</table>