How can I access iframe elements with Javascript?

Question

I have a webpage where there is a textarea within a iframe. I need to read the value of this textarea from its child page JavaScript. Presently by using window.parent.

Answer 1

If you have the HTML

and JavaScript

function iframeRef( frameRef ) {
    return frameRef.contentWindow
        ? frameRef.contentWindow.document
        : frameRef.contentDocument
}

var inside = iframeRef( document.getElementById('one') )

inside is now a reference to the document, so you can do getElementsByTagName('textarea') and whatever you like, depending on what's inside the iframe src.