JavaScript Date.toJSON() 产生的日期有错误的小时和分钟
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JavaScript Date.toJSON() produces a date which has wrong hours and minutes
提问by Arif Nadeem
I want to print a Date to ISO-8601standard: YYYY-MM-DDTHH:mm:ss.sssZso I used the following lines of code, but I am getting unexpected output
我想打印一个日期到ISO-8601标准：YYYY-MM-DDTHH:mm:ss.sssZ所以我使用了以下代码行，但我得到了意外的输出
var date = new Date(2012, 10, 30, 6, 51);
print('UTC Format: '+date.toGMTString());
print('toString() method: '+date.toString());
print('toJSON() method: '+date.toJSON());//print hours and minutes incorrectly
print('to UTCString() method: ' + date.toUTCString());
The corresponding output is
对应的输出是
UTC Format: Fri, 30 Nov 2012 01:21:00 GMT
toString() method: Fri Nov 30 2012 06:51:00 GMT+0530 (India Standard Time)
toJSON() method: 2012-11-30T01:21:00.000Z
to UTCString() method: Fri, 30 Nov 2012 01:21:00 GMT
The toJSON() method prints hours and minutes incorrectly but toString() prints it correctly, I wanted to know what is the reason for that. Do I have to add time offset to the Date object, if yes then how?
toJSON() 方法错误地打印小时和分钟，但 toString() 正确打印，我想知道这是什么原因。我是否必须向 Date 对象添加时间偏移量，如果是，那么如何？
回答by Sushil Dravekar
var date = new Date();
console.log(date.toJSON(), new Date(date.getTime() - (date.getTimezoneOffset() * 60000)).toJSON());
回答by hereandnow78
date.toJSON()prints the UTC-Date into a string formatted as json-date.
date.toJSON()将 UTC-Date 打印为格式为 json-date 的字符串。
If you want your local-time to be printed, you have to use getTimezoneOffset(), which returns the offset in minutes. You have to convert this value into seconds and add this to the timestamp of your date:
如果您希望打印本地时间，则必须使用getTimezoneOffset()，它以分钟为单位返回偏移量。您必须将此值转换为秒并将其添加到日期的时间戳中：
var date = new Date(2012, 10, 30, 6, 51);
new Date(date.getTime() + (date.getTimezoneOffset() * 60000)).toJSON()
