Ironically, though, the original Google Maps didn&#x27;t actually use XMLHTTPRequest, at least not for the trackable maps— that was all just moving &lt;img&gt; tags around and changing the src attributes on them.<p>XHR may have been used to fetch search results, although it later switched to a JSONP interface with generated script tags so that the various APIs (geocoding, directions, etc) could be used by third party sites on other domains.