288838 - Cannot let server decide if script is E4X or not (content type)

Status: RESOLVED WONTFIX

(Core :: DOM: Core & HTML, defect)

Description

[Hixie (not reading bugmail)]

If I have a <script src=""> element that points to an external JS file, I have
no way of making the script claim to be using E4X without modifying the calling
HTML file. I _should_ be able to just change the script's MIME type to have the
e4x=1 flag and then it should just become E4X enabled.

TESTCASE:
   http://www.hixie.ch/tests/adhoc/http/content-type/js/002.html

See also related bug 288835 (type="" takes precedence) and bug 100924 (can't use
E4X in event handler attributes).

Comment 1

[Ed Lee :Mardak]

Attachment: explicit testcase

Derived from the linked URL. This uses data URI's to explicitly show that the
data types are indeed text/javascript;e4x=1.

Also, there's a halfway step to show that e4x is indeed working when the type
is forced in the script tag.

Comment 2

[Yuh-Ruey Chen]

Well e4x is already partially enabled even without the e4x=1. Brendan said that
only top-level XML comment and CDATA literals are ignored without e4x=1. So try
this:

if (false)
   <!--comment-->
alert('e4x enabled');

Comment 3

[Hixie (not reading bugmail)]

Not how the Web works, it seems.