格式date与moment.js

我有这种格式的string：

var testDate = Fri Apr 12 2013 19:08:55 GMT-0500 (CDT)

我想用这个格式的mm/dd/yyyy : 04/12/2013来显示。

我试图用这个方法来做， 

 moment(testDate,'mm/dd/yyyy');

哪个错误说there is no such method called replace ？ 我以错误的方式接近这个吗？

编辑：

我还应该提到，我正在使用pre.js包装版本的meteor.js 

 Object [object Date] has no method 'replace' : The Exact error from the console

堆栈跟踪： 

  at makeDateFromStringAndFormat (http://127.0.0.1:3000/packages/moment/lib/moment/moment.js?b4e3ac4a3d0794023a4410e7941c3e179398b5b0:539:29) at moment (http://127.0.0.1:3000/packages/moment/lib/moment/moment.js?b4e3ac4a3d0794023a4410e7941c3e179398b5b0:652:24) at populateProfileForEdit (http://127.0.0.1:3000/client/views/home/administration/directory/profiles/profiles.js?acfff908a6a099f37312f62892a22b40f82e5e0f:147:25) at Object.Template.profile_personal.rendered (http://127.0.0.1:3000/client/views/home/administration/directory/profiles/profiles.js?acfff908a6a099f37312f62892a22b40f82e5e0f:130:13) at Spark.createLandmark.rendered (http://127.0.0.1:3000/packages/templating/deftemplate.js?b622653d121262e50a80be772bf5b1e55ab33881:126:42) at http://127.0.0.1:3000/packages/spark/spark.js?45c746f38023ceb80745f4b4280457e15f058bbc:384:32 at Array.forEach (native) at Function._.each._.forEach (http://127.0.0.1:3000/packages/underscore/underscore.js?867d3653d53e9c7a171483edbcad9670e12288c7:79:11) at http://127.0.0.1:3000/packages/spark/spark.js?45c746f38023ceb80745f4b4280457e15f058bbc:382:7 at _.extend.flush (http://127.0.0.1:3000/packages/deps/deps.js?9642a93ae1f8ffa8eb1c2475b198c764f183d693:231:11)

moment()的第二个参数是parsing格式，而不是显示格式。

为此，您需要.format()方法 ： 

 moment(testDate).format('MM/DD/YYYY');

另外请注意，这种情况很重要。 对于月份，月份的date和年份，格式应该是大写的。

包括moment.js和使用下面的代码，你可以格式化你的date 

 var formatDate= 1399919400000; var responseDate = moment(formatDate).format('DD/MM/YYYY');

我的输出是“13/05/2014”

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