Get element from within an iFrame

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南方客 2020-11-21 23:33
How do you get a
from within an
</code>?</p>
             
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                <span>(楼主)</span>
            
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                <span>2020-11-22 00:33</span>
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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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