Get element from within an iFrame

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How do you get a
from within an
</code>?</p>
             
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<p>None of the other answers were working for me. I ended up creating a function within my iframe that returns the object I was looking for:</p>

<pre><code>function getElementWithinIframe() {
    return document.getElementById('copy-sheet-form');
}
</code></pre>

<p>Then you call that function like so to retrieve the element:</p>

<pre><code>var el = document.getElementById("iframeId").contentWindow.functionNameToCall();
</code></pre>
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<p>If iframe is not in the same domain such that you cannot get access to its internals from the parent but you can modify the source code of the iframe then you can modify the page displayed by the iframe to send messages to the parent window, which allows you to share information between the pages. Some sources:</p>

<ul>
<li>https://developer.mozilla.org/en-US/docs/Web/API/Window/postMessage</li>
<li>Html5 - Cross Browser Iframe postmessage - child to parent?</li>
<li>cross site iframe postMessage from child to parent</li>
</ul>
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<pre class="lang-script prettyprint-override"><code>window.parent.document.getElementById("framekit").contentWindow.CallYourFunction('pass your value')
</code></pre>

<p><code>CallYourFunction()</code> is  function inside page and that function action on it</p>
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<p>Above answers gave good solutions using Javscript.
Here is a simple jQuery solution:</p>
<pre><code>$('#iframeId').contents().find('div')
</code></pre>
<p>The trick here is jQuery's <code>.contents()</code> method, unlike <code>.children()</code> which can only get HTML elements, <code>.contents()</code> can get both text nodes and HTML elements. That's why one can get document contents of an iframe by using it.</p>
<p>Further reading about jQuery <code>.contents()</code>: .contents()</p>
<p><strong>Note</strong> that the iframe and page have to be on the same domain.</p>
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<p>Do not forget to access iframe <strong>after it is loaded</strong>. Old but reliable way without jQuery:</p>

<pre><code>&lt;iframe src="samedomain.com/page.htm" id="iframe" onload="access()"&gt;&lt;/iframe&gt;

&lt;script&gt;
function access() {
   var iframe = document.getElementById("iframe");
   var innerDoc = iframe.contentDocument || iframe.contentWindow.document;
   console.log(innerDoc.body);
}
&lt;/script&gt;
</code></pre>
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<pre><code>var iframe = document.getElementById('iframeId');
var innerDoc = (iframe.contentDocument) ? iframe.contentDocument : iframe.contentWindow.document;
</code></pre>

<p>You could more simply write:</p>

<pre><code>var iframe = document.getElementById('iframeId');
var innerDoc = iframe.contentDocument || iframe.contentWindow.document;
</code></pre>

<p>and the first valid inner doc will be returned.</p>

<p>Once you get the inner doc, you can just access its internals the same way as you would access any element on your current page. (<code>innerDoc.getElementById</code>...etc.)</p>

<p><strong>IMPORTANT:</strong> Make sure that the iframe is on the same domain, otherwise you can't get access to its internals. That would be cross-site scripting.</p>
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