javascript 类型错误:variable.getHours(); 未定义,其中变量 = Date.now()?
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TypeError: variable.getHours(); is undefined, where variable = Date.now()?
提问by StackThis
Am looking to get the current Datetime, and extract Hours, Minutes, etc., for adding a timestamp to messages..
我希望获取当前日期时间,并提取小时、分钟等,以便为消息添加时间戳。
Why does the console log TypeError: Date.datetimeNow is undefined
for this:
为什么控制台会记录TypeError: Date.datetimeNow is undefined
这个:
var datetimeNow = Date.now();
var hourNow = datetimeNow.getHours();
var minuteNow = datetimeNow.getMinutes();
回答by Lauris
Instead of:
代替:
var datetimeNow = Date.now();
try this:
试试这个:
var datetimeNow = new Date();
回答by jhyap
var datetimeNow = new Date();
var hourNow = datetimeNow.getHours();
var minuteNow = datetimeNow.getMinutes();
You need to init datetimeNow
as date object
您需要初始化datetimeNow
为日期对象
回答by Scimonster
Date.now()
returns a number representing the number of milliseconds since the UNIX epoch (1970/1/1 00:00:00.000 UTC). Numbers don't have Date methods.
Date.now()
返回一个数字,表示自 UNIX 纪元(1970/1/1 00:00:00.000 UTC)以来的毫秒数。数字没有 Date 方法。
To use Date methods, you need to initialize datetimeNow
as a Date
object.
要使用 Date 方法,您需要初始化datetimeNow
为一个Date
对象。
var datetimeNow = new Date();