Bug 137287

Summary: For a Date object from a different frame: ""+date !== date.toString()
Product: WebKit Reporter: Will Thimbleby <will>
Component: WebCore JavaScriptAssignee: Nobody <webkit-unassigned>
Status: NEW ---    
Severity: Normal CC: ap, ggaren, sam, webkit-bug-importer
Priority: P2 Keywords: InRadar
Version: 528+ (Nightly build)   
Hardware: Unspecified   
OS: Unspecified   
See Also: https://bugs.webkit.org/show_bug.cgi?id=119898
Description Flags
Sandboxed date string conversion test case. none

Description Will Thimbleby 2014-09-30 22:15:00 PDT
Created attachment 238997 [details]
Sandboxed date string conversion test case.

Given a sandboxing iFrame, after creating a Date object from the sandbox, calling date.toString() gives a different result to calling ""+date.

The automatic conversion of the date to a string when appended to a string is wrong:
""+date === 1412140297227

See attachment with test case.
Comment 1 Alexey Proskuryakov 2014-10-04 17:07:37 PDT
This happens any time the date object is created via a different frame - it does not have to be display:none, and it doesn't have to be empty.
Comment 2 David Kilzer (:ddkilzer) 2016-09-09 10:55:33 PDT