ember-stopwatch

This addon provides some utilities and services that make it easier to control timing in your Ember applications.

Installation

ember install ember-stopwatch

Demo

Demo

Usage

• Stopwatch
• Timer
• Clock

Stopwatch

A Stopwatch is a utility that allows you to be notified when ticks occur, making it easy for you to asynchronously take action on time-based boundaries.

The Stopwatch uses @tracked properties so your application can react to changes in time, based on the tick interval.

The stop and reset methods allow you to either stop on the next tick interval, or forcefully ( i.e. immediately).

As an element modifier

The easiest and quickest way to start adding time utilities to your app is by using the stopwatch-tick modifier.

Your action handler will be passed the elapsed time and number of durations (ticks).

Note that the stopwatch will start as soon as your element is inserted and the modifier is instrumented.

<div {{stopwatch-tick 1000 (fn (mut this.finishedLoading) true)}}>
    {{#if this.finishedLoading}}
        Waited 1 second, loaded!
    {{/if}}
</div>

You can also provide a number of ticks as an optional named parameter.

<div {{stopwatch-tick 1000 (fn (mut this.finishedLoading) true) ticks=10}}>
    {{#if this.finishedLoading}}
        Waited 10 seconds, loaded!
    {{/if}}
</div>

There also exists an alias for stopwatch-tick named call-after which may be more intuitive for your use-case.

<div {{call-after 1000 (fn (mut this.finishedLoading) true)}}>
    ...
</div>

As a utility

This allows you to create multiple stopwatches anywhere in your application.

import Stopwatch from "ember-stopwatch/utils/stopwatch";

// ...
let stopwatch = new Stopwatch();
stopwatch.start();
stopwatch.stop();
stopwatch.reset();
stopwatch.on("tick", someHandler);
// ...

{{this.stopwatch.elapsedMillis}}
{{this.stopwatch.numTicks}}

As a Service

A stopwatch service can be used that is shared globally in your application.

export default class extends Component {
    @service stopwatch;

    @action
    start() {
        this.stopwatch.start();
    }

    @action
    stop() {
        this.stopwatch.stop();
    }
}

Timer

A Timer is a utility that extends the Stopwatch behavior described above, except that the use-case is to handle "countdown" eventing. This enables your application to react to a timeout event.

Additionally, the Timer can be paused and restarted and contains reactful state properties ( e.g. remainingMillis and isExpired).

import Timer from "ember-stopwatch/utils/timer";

// ...
let timer = new Timer(60000);
timer.on("expired", this, expirationHandler);
timer.start();
// ...

expirationHandler(){
    console.log('Time is up!');
}

{{this.timer.remainingMillis}}
{{this.timer.isExpired}}

Clock

As an element modifier

The clock-tick modifier can be used to react to various time tick types, which includes second, minute, hour, and day.

Your action handler will be passed the current time (from the clock service), when triggered.

Note that the ticks will be triggered on clock time thresholds, not elapsed time / durations (e.g. when the actual clock rolls over to a new second, minute, hour, etc.).

export default class extends Component {
    @tracked time;
}

<div {{clock-tick "second" (fn (mut this.time))}}>
    {{moment-format this.time}}
</div>

As a utility

A Clock is a utility that tracks time ticks for the current system time.

A Clock triggers events on time ticks, including second, minute, hour, and day. A Clock also provides reactful time, date, second, minute, hour, and day properties.

import Clock from "ember-stopwatch/utils/clock";

// ...
let clock = new Clock();
clock.on("second", myHandler.bind(this, "second"));
clock.on("minute", myHandler.bind(this, "minute"));
clock.start();
// ...

myHandler(type) {
    console.log(`${type} ticked`);
}

{{this.clock.time}}

As a Service

A clock service automatically creates and starts a single instance of the Clock utility and is a proxy for properties and methods of a clock instance. A clock service also has @tracked versions of the clock properties second, minute, hour, and day that can be used by the other reactive getters in your application, including the @computed macros.

export default class extends Component {
    @service clock;
}

{{moment-format this.clock.time}}

export default class extends Component {
    @service clock;

    @computed("clock.minute")
    get timeByTheMinute() {
        return new Date().getTime();
    }

    @computed("clock.hour")
    get timeByTheHour() {
        return new Date().getTime();
    }

    @computed("clock.day")
    get timeByTheDay() {
        return new Date().getTime();
    }
}

Refreshes every second:
{{moment-format this.clock.time}}
Refreshes every minute:
{{moment-format this.timeByTheMinute}}
Refreshes every hour:
{{moment-format this.timeByTheHour}}
Refreshes every day:
{{moment-format this.timeByTheDay}}

Compatibility

• Ember.js v3.20 or above
• Node.js v12 or above

Contributing

See the Contributing guide for details.

License

This project is licensed under the MIT License.