javascript - iframe resizing with scrollheight in chrome/safari

Question

I'm trying to resize (make bigger or smaller) an iframe based on it's contents. After a click on each page a method is called which does the resizing.

In Chrome I can make the iframe bigger, but not smaller. document.body.scrollHeight is always the biggest value.

So if one big page sets #iframe.height = '620px', and someone clicks on a link to page with less content scrollHeight will remain at 620px instead of decreasing.

What's the proper way of handling this in Chrome/Safari?

Answer 1

Before you ask for the height of the document inside the iframe you should set the height of the iframe object to "auto". Something like this:

objIframe = document.getElementById('theIframeId');    
objIframe.style.height = 'auto';

And now:

document.body.scrollHeight

returns the actual height of the document.