29063 2009-09-08 18:37:36 -0700 JSON.stringify(Date) loses the milliseconds information 2009-09-09 00:10:30 -0700 1 1 1 Unclassified WebKit JavaScriptCore 528+ (Nightly build) Mac (Intel) OS X 10.5 RESOLVED FIXED P3 Normal --- 1 shumpei.shiraishi webkit-unassigned oliver oldest_to_newest 145619 0 39241 shumpei.shiraishi 2009-09-08 18:37:36 -0700 Created attachment 39241 Test case for this bug. I tried to use the JSON.stringify() for Date object on Safari4 and WebKit nightly build(48096), so I got result as follows. > JSON.stringify(new Date()); > 2009-09-07T04:49:43Z This result seems that milliseconds information of date is lost. For some applications, millis info is important and this behavior may be problem. And in the ECMAScript 5th specification, Date.toISOString() (this function is called from Date.prototype.toJSON()) is defined as: ...Date Time string format (15.9.1.15). *All fields are present* in the string... So, I think the Webkit's behavior should be treated as a bug, isn't it? P.S. Current implementations' status is as follows (tested by attached test case): Firefox3.5: keep milliseconds Webkit: lost milliseconds Opera10: not yet implemented IE8: lost milliseconds Mmm... IE8's behavior is same as Webkit. Is current behavior collect? Is JSON.stringify() useless for apps which want to treat the information of milliseconds? 145627 1 oliver 2009-09-08 18:55:23 -0700 > Mmm... IE8's behavior is same as Webkit. > Is current behavior collect? Is JSON.stringify() useless for apps which want to > treat the information of milliseconds? Per spec it is incorrect, but that said, toJSON is a function like any other, eg. Date.prototype.toJSON = function() { ... } 145639 2 shumpei.shiraishi 2009-09-08 20:20:04 -0700 > Per spec it is incorrect, but that said, toJSON is a function like any other, > eg. > Date.prototype.toJSON = function() { > ... > } OK, I see. And I wrote a JS library for ISO-8601 date format. It is useful to implement the custom Date.prototype.toJSON(). http://wiki.github.com/shumpei/iso8601.js/ 145666 3 39250 oliver 2009-09-08 23:33:46 -0700 Created attachment 39250 Patch v1 145673 4 39250 mjs 2009-09-09 00:00:43 -0700 Comment on attachment 39250 Patch v1 r=me 145676 5 oliver 2009-09-09 00:10:30 -0700 Landed r48202 39241 2009-09-08 18:37:36 -0700 2009-09-08 18:37:36 -0700 Test case for this bug. 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