Autoheight iframes, similar to those found on eBay,

Is there a method to adjust the height of an iframe in the y-axis so that the content properly fits within it?

The challenge lies in finding solutions that work within the constraints imposed by modern CORS and Same Origin policies enforced by web browsers.

Despite these limitations, platforms like eBay seem to have found a way to resize iframes based on their content's height. Initially, I suspected this functionality might be server-side, but upon disabling JavaScript, I noticed that the iframe's starting height is approximately 10k px.

What specific attribute of the child-frame allows for this seamless resizing that can be accessed by the parent frame?

Answer №1

It's important to remember that an iframe is essentially isolated from its parent and doesn't have knowledge of or interaction with it, making it unable to determine the size of its parent container.

While there are ways to communicate with the parent if the iframe source is from the same domain, this communication won't work across different domains.

In my research, I discovered that the most effective way to tackle this issue is by utilizing a library like https://github.com/davidjbradshaw/iframe-resizer (which has cross-domain functionality). Fortunately, this library is reliable and performs excellently.

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