It amazes me that JavaScript's Date object does not implement an add function of any kind.
I simply want a function that can do this:
var now = Date.now(); var fourHoursLater = now.addHours(4); function Date.prototype.addHours(h) { // how do I implement this? }
I would simply like some pointers in a direction.
Do I need to do string parsing?
Can I use setTime?
How about milliseconds?
Like this:
new Date(milliseconds + 4*3600*1000 /*4 hrs in ms*/)?
This seems really hackish though - and does it even work?
To add hours to a JavaScript Date object, use the setHours() method. Under that, get the current hours and 2 hours to it. JavaScript date setHours() method sets the hours for a specified date according to local time.
JavaScript Code:function timeConvert(n) { var num = n; var hours = (num / 60); var rhours = Math. floor(hours); var minutes = (hours - rhours) * 60; var rminutes = Math.
JavaScript Date objects represent a single moment in time in a platform-independent format. Date objects contain a Number that represents milliseconds since 1 January 1970 UTC. Note: TC39 is working on Temporal, a new Date/Time API.
JavaScript itself has terrible Date/Time API's. Nonetheless, you can do this in pure JavaScript:
Date.prototype.addHours = function(h) { this.setTime(this.getTime() + (h*60*60*1000)); return this; }
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