TA貢獻1772條經驗 獲得超6個贊
參數是字符串的時候，會使用Date.parse，而其中咋解釋字符串"0"是實現自己定義的。這與參數是數字的時候完全不同。TheparsefunctionappliestheToStringoperatortoitsargument.IfToStringresultsinanabruptcompletiontheCompletionRecordisimmediatelyreturned.Otherwise,parseinterpretstheresultingStringasadateandtime;itreturnsaNumber,theUTCtimevaluecorrespondingtothedateandtime.TheStringmaybeinterpretedasalocaltime,aUTCtime,oratimeinsomeothertimezone,dependingonthecontentsoftheString.ThefunctionfirstattemptstoparsetheStringaccordingtotheformatdescribedinDateTimeStringFormat(20.3.1.15),includingexpandedyears.IftheStringdoesnotconformtothatformatthefunctionmayfallbacktoanyimplementation-specificheuristicsorimplementation-specificdateformats.Stringsthatareunrecognizableorcontainout-of-boundsformatfieldvaluesshallcauseDate.parsetoreturnNaN.
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