Easy to use Timer/Chronometer/Countdown library compatible with AMD and NodeJS

npm install easytimer.js --save

bower install easytimer.js

<script src="lib/easytimer/dist/easytimer.min.js"></script>
<script>
    var timerInstance = new easytimer.Timer();
</script>

var Timer = require('easytimer.js').Timer;
var timerInstance = new Timer();

// or 

var { Timer } = require('easytimer.js');
var timerInstance = new Timer();

import Timer from 'easytimer.js';
const timer = new Timer();

// or 

import { Timer } from 'easytimer.js';
const timer = new Timer();

require(['node_modules/easytimer.js/dist/easytimer.min.js'], function (easytimer) {
    var timer = new easytimer.Timer();
});

// or

require(['node_modules/easytimer.js/dist/easytimer.min.js'], function ({ Timer }) {
    var timer = new Timer();
});

http://albert-gonzalez.github.io/easytimer.js/

var timer = new Timer(/* default config */);
timer.start(/* config */);
timer.addEventListener('secondsUpdated', function (e) {
    $('#basicUsage').html(timer.getTimeValues().toString());
});

• start(config): Start the timer
  • Parameters:
    • config (object):
      • startValues (object or array): The initial values of the timer when it is started
        • Accepted Values: Object with some of these keys: 'secondTenths', 'seconds', 'minutes', 'hours', 'days'. Or an array with this 5 positions: [secondTenths, seconds, minutes, hours, days]
        • Default Value (object or array): [0,0,0,0,0]
      • target (object or array): The target values that will make the timer to stop.
        • Accepted Values: Object with some of these keys: 'secondTenths', 'seconds', 'minutes', 'hours', 'days'. Or an array with this 5 positions: [secondTenths, seconds, minutes, hours, days]
        • Default Value: Undefined
      • precision (string): The timer update frequency.
        • Accepted Values: 'secondTenths', 'seconds', 'minutes', 'hours'
        • Default value: 'seconds'
      • callback (function): A callback function executed every time the timer is updated. The callback receives the timer as a parameter.
      • countdown (bool): If true, the timer is a countdown.
  • You can pass this same config when a Timer instance is created. For example: new Timer({ target: { seconds: 10 } }). This default config will be merged with the config passed to the start function.
• stop(): Stop the timer
• pause(): Pause the timer. After pause, you can call the start method without parameters to resume the timer.
• reset(): Reset the timer values
• isRunning(): Returns true if the timer is currently running.
• addEventListener(eventType, callback): Add a listener to an event. Timer triggers events when is updated
  • Events triggered:
    • secondTenthsUpdated
    • secondsUpdated
    • minutesUpdated
    • hoursUpdated
    • daysUpdated
    • targetAchieved
    • stopped
    • reset
    • started
    • paused
  • Parameters:
    • eventType (string): The type of the event that you want to listen.
    • callback (function): Function that will be executed when the timer triggers the specified event. The callback receives an object with the timer as a parameter.
• on(eventType, callback): addEventListener alias.
• removeEventListener(eventType, callback): Remove an event listener from the timer. Same usage as addEventListener.
• off(eventType, callback): removeEventListener alias.
• getTimeValues(): Returns an object with the current values. The keys of the returned object are 'secondTenths', 'seconds', 'minutes', 'hours' and 'days'.
• getTotalTimeValues(): Returns an object with the current absolute values. The keys of the returned object are 'secondTenths', 'seconds', 'minutes', 'hours' and 'days'.

Easytimer uses dispatchEvent, and this feature is available in these Browsers:

• Chrome (version >= 4)
• Firefox (version >= 2)
• IE (version >= 9)
• Opera (version >= 9)
• Safari (version >= 3)
• Mobile browsers

This library uses the Date class to calculate timer values. Date uses the system clock. If this clock is changed to a different date while the timer is running the timer values will be incorrect after that. If you know a way to fix that without losing time precision, please collaborate!