easytimer.js

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

Install

NPM

npm install easytimer.js --save

Bower

bower install easytimer.js

Library Load

Script

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

Node

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

// or

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

ES6 / Typescript Imports

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

// or

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

AMD

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();
});

Examples

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

Basic Usage

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

React

If you want to use EasyTimer with React, you can use the EasyTimer React Hook. You can check out the hook documentation here:

EasyTimer React Hook

Timer instance API

• 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.
• isPaused(): Returns true if the timer is paused.
• 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): Removes an event listener from the timer. Same usage as addEventListener.
• off(eventType, callback): removeEventListener alias.
• removeAllEventListeners(eventType): Removes all events listeners for the given type. If no type is given it will remove all event listeners.
• 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'.
• getConfig(): Returns the configuration parameters.

Browser Support

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

Known Issues

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!