chronoman

Utility class to simplify use of timers created by setTimeout.

Features

• Support for one-time (like setTimeout) or recurrent (like setInterval) timers.
• It is possible to repeat action indefinitely (recurrent property), specified number of times (repeatQty property) or depending on result of control function (repeatTest property).
• Time period (timeout) can be: a fixed value, a random value, an item selected from a list depending on action's execution number, or a value returned from specified function.
• Action that is called can be a function or an object specifying function and its call's context.
• Action result is saved in timer's field for further access.
• Timer's start time, stop time and action execution times are saved in startTime, stopTime and executeTime properties correspondingly.

var timer = new Timer({
    period: [100, 200, 300, 400, 500, {start: 100, end: 500}],
    repeatQty: 100,
    passToAction: true,
    action: function(tmr) {
        console.log("#", tmr.getExecutionQty() + 1, ":", new Date());
    },
    active: true
});
...
timer.stop();

Installation

Node

npm install chronoman

Bower

bower install chronoman

AMD, <script>

Use dist/chronoman.js or dist/chronoman.min.js (minified version).

Usage

ECMAScript 6/2015

import Timer from "chronoman";

Node

var Timer = require("chronoman").Timer;

AMD

define(["path/to/dist/chronoman.js"], function(chronoman) {
    var Timer = chronoman.Timer;
    ...
});

Bower, <script>

<!-- Use bower_components/chronoman/dist/chronoman.js if the library was installed by Bower -->
<script type="text/javascript" src="path/to/dist/chronoman.js"></script>
<script type="text/javascript">
    // сhronoman is available via Chronoman field of window object
    var Timer = Chronoman.Timer;
    ...
</script>

Example

var tmrOne = new Timer({
    period: function(timer) {
        return 1000 + (timer.getExecutionQty() * 100);
    },
    action: function(timer) {
        console.log("---> Timer one. ", timer);
        if (! tmrThree.isActive()) {
            tmrThree.start();
        }
    }
});

var tmrTwo = new Timer();
tmrTwo.setPeriod([2000, , {start: 1000, end: 1500}])
    .setRepeatQty(9)
    .setPassToAction(true)
    .setAction({
        i: 0,
        execute: function(timer) {
            var nI = ++this.i;
            console.log("Timer two. #", nI, timer);
            tmrOne.setActive(nI % 2 === 1);
        }
    });

var tmrThree = new Timer()
                    .setPeriod(3000)
                    .setRepeatTest(function() {
                        return tmrTwo.isActive();
                    });
tmrThree.onExecute = function() {
    console.log("* Timer three. #", this.getExecutionQty() + 1);
};

tmrTwo.start();

See test/chronoman.js for additional examples.

API

See doc folder.

Related projects

• NumGen
• povtor

Inspiration

This module is inspired by qooxdoo's qx.event.Timer class.

Licence

Copyright (c) 2013-2020 Denis Sikuler
Licensed under the MIT license.