stopWatch

A simple JavaScript library implementing a stopwatch typically used in timing middle distance fun runs/races.

Background

Note this is a simple stopwatch timer using the setInterval function, be aware of the caveats when using.

Installation

To use with the browser:

<script src="path/to/yourCopyOf/stopwatch.js"></script>

you can also import the named exports stopWatch and msToTime from stopwatch.js using ES6 module static import statement:

import { stopWatch, msToTime } from './path/to/yourCopyOf/stopwatch.js';

Usage

stopwatch.js exports the stopWatch object and the msToTime function.

msToTime is a simple function that translates ms to "hh:mm:ss:---" format.

The stopWatch objects encapsulates all the functions needed for implementing a basic stopWatch.

To configure stopWatch:

stopWatch.setConfig = {
        tickerFunction:()=>{},
        tickerInterval:250,
        distanceMarkers:[]
}

• tickerFunction is the function you wish to be executed on every tick of the clock. Defaults to

() => {console.log("Time Elapsed ",this.getElapsedTime," ms")

• tickerInterval is the interval in ms between function calls. Defaults to 250 ms.
• distanceMarkers is an array containing the distance markers at which you want the pace calculated for. For example [2.5,5.0,7.5] could be used for a 10 km run with a 2.5 km lap, allowing pace feedback to runners after every lap.

stopWatch functions

stopWatch.startTimer()

Starts the timer, firing the tickerFunction after every interval, and records the starting time.

stopWatch.stopTimer()

Stops the timer and records the elapsed time, and finishing time.

stopWatch.togglePause()

Pauses the timer, and records the time when paused, so that on restart the time paused is subtracted from the start - finish time.

stopWatch.resetTimer()

Resets the stopWatch, without clearing the configuration set by stopWatch.setConfig

stopWatch.clearConfig()

Equivalent to

stopWatch.setConfig = {
    tickerFunction: null,
    tickerInterval: null,
    distanceMarkers: []
}

stopWatch.calculatePace

a getter that returns an Array containing the pace at every distancemarker based on the elapsed time.

stopWatch.getTickerTime

a getter that returns the last time setInterval executed the callback. Use JavaScript .toLocaleTimeString() to convert to localized time format.

stopWatch.getElapsedTime

a getter returning the time elapsed from the start time to the last time setInterval executed the callback.

stopWatch.recordSplit()

Pushes the last split time onto the splits Array.

stopWatch.getSplits

a getter that returns an Array of the splits.

msToTime(time)

Converts time in ms to "HH:MM:SS:sss" format