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November 29, 2017 22:02
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Subtracts a date from the current time, and presents it (like Twitter) as "2s" or "2m" or "2h" ago, or as a date.
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var getTimeAgo = function(datestring) { | |
// Takes in any datestring that can be used with the Date() constructor: | |
// e.g., "10/22/15" or "Wed Nov 29 2015 13:42:33 GMT-0800 (PST)" | |
// and outputs a date like Twitter's datetimestamps. | |
var d1 = new Date(); | |
var d2 = new Date(datestring); | |
var timeAgo = d1.getTime()-d2.getTime(); | |
if ((timeAgo/1000/60/60/24) >= 1) { | |
// return full date: "Nov 10" if same year, or "10 Nov 2015" | |
var months = ["Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec"]; | |
if (d2.getFullYear() !== d1.getFullYear()) { | |
return d2.getDate() + ' ' + months[d2.getMonth()] + ' ' + d2.getFullYear().toString().substr(2,2); | |
} else { | |
return months[d2.getMonth()] + ' ' + d2.getDate(); | |
} | |
} else if ((timeAgo/1000/60/60) >= 1) { | |
// return hours if less than 24: "2h" | |
return ""+Math.floor(timeAgo/1000/60/60)+"h"; | |
} else if ((timeAgo/1000/60) >= 1) { | |
// return minutes if less than 60: "17m" | |
return ""+Math.floor(timeAgo/1000/60)+"m"; | |
} else if ((timeAgo/1000) >= 1) { | |
// return seconds if less than 60: "42s" | |
return ""+Math.floor(timeAgo/1000)+"s"; | |
} else { | |
// otherwise, let's just say it was "now" | |
return "now"; | |
} | |
} |
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