Date.prototype.startOf >= 0.1.4
Purpose
Set the current date to the start of a unit of time
Syntax
Date#startOf
(
Stringunit
);
Parameters
unit
Return values
Date
Returns itself
Examples
var a = new Date("2015-08-26T15:29:00.000Z");
>>> Wed Aug 26 2015 17:29:00 GMT+0200 (CEST)
a.startOf('hour');
>>> Wed Aug 26 2015 17:00:00 GMT+0200 (CEST)
a.startOf('month');
>>> Sat Aug 01 2015 00:00:00 GMT+0200 (CEST)
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