I’m using jQuery File Upload with Ruby on Rails 3 $(.jquery-upload).fileupload({ url: /photos, type:

Question

Asked: June 13, 20262026-06-13T10:42:54+00:00 2026-06-13T10:42:54+00:00

I’m using jQuery File Upload with Ruby on Rails 3

$(".jquery-upload").fileupload({
    url: "/photos",
    type: "POST",
    dataType: "script" });

Works as supposed in Chrome and other browsers, but IE sends the request as HTML rather than JS:

Started POST "/photos"
Processing by PhotosController#create as HTML

Changing “url” to “/photos.js” to force JS format resulted in IE prompting to download the returned JS instead of processing it.

How can I make IE request “script” and process it as JS?

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Editorial Team · Answer 1 · 2026-06-13T10:42:55+00:00

Editorial Team

Your problem answer seems to be explained in your plugin’s documentation : https://github.com/blueimp/jQuery-File-Upload/wiki/Setup

Look at the Content-Type Negotiation paragraph.

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