Closed Bug 309712 Opened 15 years ago Closed 15 years ago

HTML-style comments in the middle of .js file cause part of script to be ignored (treated as XML data)


(Core :: JavaScript Engine, defect, P1)






(Reporter: jruderman, Assigned: brendan)




(Keywords: fixed1.8, js1.6, regression)


(2 files)

Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; en-US; rv:1.8b5) Gecko/20050922

Steps to reproduce:
1. Hover one of the equipment icons in

Result: Nothing happens.

Expected: Info box should appear.

Regression from bug 309242, "E4X should be on by default, while preserving the
comment hiding hack".

Identified by MozillaZine Forum member bizarrojack in
I guess we can...

(1) Back out bug 309242 and go back to requiring opt-in for E4X.

(2) Ask sites that use HTML-style comments in strange ways to change their code.

(3) Change the heuristic introduced by bug 309242 to handle this case as the
author intended.  For example, treat "<!--" as the beginning of XML comment data
iff it does not occur at the beginning of a statement.

Brendan, is (3) realistic?
The heuristic is there just to spare people from having to select an E4X
version, via e4x=1, version=1.6, or better than these ineffective MIME type
parameters on application/javascript, perhaps the application/e4x MIME type
that Chris Lilley is proposing.

So if the heuristic is hurting, make it conservative, which may at the margin
require some E4X users to do the right thing, anyway, and request the MIME type
they require.

Attachment #197152 - Flags: superreview?(shaver)
Attachment #197152 - Flags: review?(mrbkap)
Assignee: general → brendan
Flags: blocking1.8b5+
Comment on attachment 197152 [details] [diff] [review]
Use a more conservative heuristic


Attachment #197152 - Flags: review?(mrbkap) → review+
Keywords: js1.6
OS: MacOS X → All
Priority: -- → P1
Hardware: Macintosh → All
Target Milestone: --- → mozilla1.8beta5
Comment on attachment 197152 [details] [diff] [review]
Use a more conservative heuristic

sr=shaver, though I'll also ping the Thottbot guys to fix their script!
Attachment #197152 - Flags: superreview?(shaver) → superreview+
Attachment #197152 - Flags: approval1.8b5+
Fixed on trunk and branch.

Closed: 15 years ago
Keywords: fixed1.8
Resolution: --- → FIXED
*** Bug 309806 has been marked as a duplicate of this bug. ***
*** Bug 309778 has been marked as a duplicate of this bug. ***
*** Bug 309802 has been marked as a duplicate of this bug. ***
test covered by js1_6/Regress/regress-309242.js
Flags: testcase+
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