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145For the record it's now possible to do pure AJAX file uploads if the browser supports the File API - developer.mozilla.org/en/using_files_from_web_applications– meleyalCommented Mar 25, 2011 at 10:05
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this is quite an old answer, but it was a bit misleading.. IE supported XHR natively as far back as IE7, and supported it through ActiveX as far back as IE5. w3schools.com/ajax/ajax_xmlhttprequest_create.asp. The practical way of doing this was certainly targeting flash (shockwave) components, or rolling out a Flash/ActiveX (Silverlight) control. If you can originate a request and handle the response via javascript, it's ajax.. though, having said that, ajax is synonymous with xhr, but it doesn't itself describe the underline mechanism/components that delivers/exchanges the payload.– Brett CaswellCommented Oct 29, 2015 at 14:54
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5@BrettCaswell I wasn't saying that AJAX/XHR weren't possible, just that it wasn't possible to post a file up with them on old —but everliving— versions of IE. That was and remains completely true.– OliCommented Oct 29, 2015 at 15:34
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