Usage for https://gist.github.com/jmrocela/7167208

usage-for-iso8601.js

var iso8601 = require('./iso8601-durations.js');

// Create a new ISO8601 date
var isoDate = new iso8601('R5/2013-12-23T19:30:08Z/P1Y2M10DT2H30M');

// Get Date
// ISO8601.getDate() returns a native Javascript Date object
console.log('The time now is ' + isoDate.getDate());

// Get Date with formatting (requires moment.js)
console.log('The time now is ' + isoDate.getDate().format('YYYY-MM-DD HH:mm:ss'));

// Get Number of Repeats
// ISO8601.getRepeats()
console.log('This Date of ' + isoDate.getDate() + ' needs to repeat ' + isoDate.getRepeat() + ' times.');

// Get the Duration of the Interval
// ISO8601.getDuration()
console.log('This date will be relevant in ' + isoDate.getDuration().toString());

// Get Date of Next Interval
// ISO8601.getNextDate()
console.log('This date will invoke something on ' + isoDate.getNextDate().format('YYYY-MM-DD HH:mm:ss'));

// Get Date of Next Interval of the Next 5 Repeats
var intervals = isoDate.getNextDate(5);
intervals.forEach(function(interval) {
    console.log('Interval on ' + interval.format('YYYY-MM-DD HH:mm:ss'));
});