Duration 

This is a library for dealing with durations.
It works well with javascript's Date objects.

Note: For compatibility with Go's time.Duration use the golang_compatible branch.

`` sh
$ npm install duration-js
`

` js
var Duration = require("duration-js");
`

$3

* ms - millisecond
* s - second
* m - minute
* h - hour
* d - day
* w - week

` js
var d = new Duration("6w5d4h3m2s1ms");

console.log(
d.milliseconds(), "\n", // => 4075382001
d.seconds(), "\n", // => 4075382
d.minutes(), "\n", // => 67923
d.hours(), "\n", // => 1132
d.days(), "\n", // => 47
d.weeks(), "\n" // => 6
);
`

$3


` js
console.log(
"str:", Duration.hour.toString(),
"ms:", Duration.hour.valueOf()
); // => "str: 1h ms: 3600000"
`

$3

` js
// Addition
var d1 = new Duration("6d"),
d2 = new Duration(d1 + Duration.day);
console.log(d2.toString()) // => "168h"

// Multiplication
var d3 = new Duration("5m"),
d4 = new Duration(d3 * 12);
console.log(d4.toString()) // => "1h"

// etc ...
`

$3


` js
// Adding duration to date
var d = Duration.parse("5h"),
now = new Date(),
later = new Date(now + d);
console.log(later.toString());

// Duration between two dates
var bday = new Date("March 3, 1991"),
now = new Date(),
age = new Duration(now - bday);
console.log(age.toString());
`

$3

` js
setTimeout(function () {
// runs 5 minutes later
}, new Duration("5m"));

setInterval(function () {
// runs every 10 seconds
}, 10 * Duration.second);
``