What is purpose of blank.html in js directory?

Question

In Magento CE 1.7.0.2 in js directory there is file blank.html

What is purpose of this file exactly?

Solution

It's used by some Magento modules like Authorizenet as a fallback page for iframes. Other uses I have't found for it yet.

The actual URL will be set with javascript most likely, the blank html page is just to give it something to initially load.

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