Bug 23096 – version in type attribute of type "application/javascript" should be supported

• Component: JavaScriptCore
• Status: RESOLVED FIXED

[Georg Maaß]

Specifying the version in type attribute of type "application/javascript" should be supported. Actually a script with version extension in the type attribute is not executed.

This should be supported:

<script language="javascript1.6" type="application/javascript;version=1.6">

This is already supported:
<script language="javascript1.6" type="application/javascript">


Also the version specification should be used to switch ON/OFF language specific features like new key words as introduced in JavaScript 1.7 or implementation variants like the Array constructor of JavaScript 1.2.

[Mark Rowe (bdash)]

<rdar://problem/6474778>

[Ahmad Saleem]

According to the IETF's ECMAScript Media Types Updates as of May 2022, the RFC-4329 is obsolete.

Link - https://datatracker.ietf.org/doc/rfc9239/

StackOverflow - https://stackoverflow.com/questions/876561/when-serving-javascript-files-is-it-better-to-use-the-application-javascript-or

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The media type registrations herein are divided into two major
   categories: (1) the sole media type "text/javascript", which is now
   in common usage and (2) all of the media types that are obsolete
   (i.e., "application/ecmascript", "application/javascript",
   "application/x-ecmascript", "application/x-javascript", "text/
   ecmascript", "text/javascript1.0", "text/javascript1.1", "text/
   javascript1.2", "text/javascript1.3", "text/javascript1.4", "text/
   javascript1.5", "text/jscript", "text/livescript", and "text/
   x-ecmascript").

********

I am not sure whether Safari currently support "application/javascript" as of right now but I think based on latest standard, there is no need to add old attribute support.

Can this be marked accordingly? Thanks!

[Ryosuke Niwa]

Yeah, this works per HTML5 spec:
https://mimesniff.spec.whatwg.org/#javascript-mime-type