如何使用 Javascript 将日期转换为自 1970 年以来的毫秒数?
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How to convert date to milliseconds since 1970 using Javascript?
提问by TaylorMac
I have these variables: (not literally, but this is what I obtain from a datepicker)
我有这些变量:(不是字面上的,但这是我从日期选择器中获得的)
var StartMonth = "April";
var StartDate = "21";
var CurrentStartTime = "2";
var CurrentEndTime = "5";
var Startampm = "PM"; //corresponds to the CurrentStartTime
var Endampm = "PM"; //corresponds to the CurrentEndTime
I need to convert these variables to a single variable, milliseconds since 1970.
我需要将这些变量转换为单个变量,自 1970 年以来的毫秒数。
回答by Travis J
Here is a simple way to do this using the valueOf
method of Date
.
这是使用 的valueOf
方法执行此操作的简单方法Date
。
var d = new Date();
milliseconds since 1970 = d.valueOf();
回答by honzajde
Simply make use of implicit conversions like this:
只需使用这样的隐式转换:
+new Date()
回答by RobG
Convert them to a date using new Date(args), then use Date.prototype.getTime, or just convert the date to a number. It's all in ECMA-262 §15.9.
使用new Date(args)将它们转换为日期,然后使用Date.prototype.getTime,或者只是将日期转换为数字。这一切都在 ECMA-262 §15.9 中。