Closed Bug 522401 Opened 15 years ago Closed 15 years ago

domthingie.on* is undefined and not null if no event handler is set; can't use ("onpagehide" in window) to detect support

Categories

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

Product:
Core
Component:
DOM: Core & HTML
Platform:
x86
macOS
Type:
defect
Priority:
Not set
Severity:
normal

Tracking

()

Status:
RESOLVED DUPLICATE of bug 414853

People

(Reporter: jruderman, Unassigned)

Details

(Keywords: testcase) 

http://webkit.org/blog/516/webkit-page-cache-ii-the-unload-event/ suggests using the expression ("onpagehide" in window) to determine whether the browser supports the onpagehide event.  But this expression evaluates to false in Firefox, so Firefox gets the slow path!

Bug 159849 was fixed only for "with" blocks; I don't know why.

I heard a rumor that peterv was planning to fix this (for reasons other than feature detection).
> Bug 159849 was fixed only for "with" blocks; I don't know why.

That bug was fixed for the assigning case, more specifically.  The code in this case doesn't assign.

I'm pretty sure this is a duplicate...
Whiteboard: DUPEME
Status: NEW → RESOLVED
Closed: 15 years ago
Resolution: --- → DUPLICATE
Whiteboard: DUPEME
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