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    slim-observer

    1.1.0 • Public • Published

    slim-observer

    Javascript (typescript) implementation of observer pattern on less then 100 rows. It provides just o few most common functions and minified version is smaller then 2kB.

    Travis Coveralls github GitHub package version

    Installation

    slim-observer is available on NPM and Bower. To install it, type:

    $ npm install slim-observer
    

    or

    $ bower install slim-observer
    

    Usage

    You can also use it within the browser; install via npm/bower and use the slim-observer.min.js file found within the download. For example:

    <script src="./node_modules/slim-observer/dist/slim-observer.min.js"></script>
    <script>
        var observable = new SlimObserver.Subject();
        ...
    </script> 

    See full example in example.html

    Functions

    Basic usage

    // create observable subject
    var observable = new SlimObserver.Subject();
     
    // create first listener
    observable.subscribe(function(newValue){
        alert(newValue);
    });
     
    // create second listener
    observable.subscribe(function(newValue){
        console.log(newValue);
    });
     
    observable.next('hello'); // emit value to all listeners
    observable.next('world'); // emit another value

    Get last emitted value

    observable.getLast();

    Create subject with initial value

    var observable = new SlimObserver.Subject('initial value');

    New subscriber with all history values replay.

    observable.replayAndSubscribe(function(newValue){
        console.log(newValue);
    });

    Unsubscribe existing listener.

    var observable = new SlimObserver.Subject();
     
    var subscriber = observable.subscribe(function(newValue){
       alert(newValue);
    });
     
    subscriber.unsubscribe();

    Emitting only unique values (if new value is different).

    observable.nextUnique(123).nextUnique(123); // emits value to subscribers only once

    Building tools

    Build

    Transpile TS code to JS in dist/ folder. Maps included.

    npm run build
    

    Unit Test

    Tests framework used are: mocha & chai.

    npm test
    

    Testing with coverage:

    nyc npm test
    

    License

    This project seed is licensed as Public Domain. Therefore, do whatever you want including changing the license for your needs in your project. More specifically, it was licensed as CC0 (Creative Commons 0) to further improve the freedom of a Public Domain Licence in context where it is not applicable.

    Install

    npm i slim-observer

    DownloadsWeekly Downloads

    0

    Version

    1.1.0

    License

    CC0-1.0

    Unpacked Size

    76 kB

    Total Files

    15

    Last publish

    Collaborators

    • omachala