Unlocking the potential of the ‘Rx Observable’ in Angular 2 to effectively tackle double click issues

let button = document.querySelector('.mbtn');
let lab = document.querySelector('.mlab');

let clickStream = Observable.fromEvent(button,'click');

let doubleClickStream = clickStream 
        .buffer(()=> clickStream.throttle(250))
        .map(arr => arr.length)
        .filter(len => len === 2); 

doubleClickStream.subscribe(event =>{
        lab.textContent = 'double click';
}); 

    doubleClickStream.throttle(1000)
        .subscribe(suggestion =>{
            lab.textContent = '-';
        });

Unfortunately, I encountered an error in my Angular2 project that is challenging to resolve. Can anyone offer assistance? The error log is shown below:

ERROR in /Users/genilex3/Desktop/meager/angularRxjs/angularrxjs/src/app/app.component.ts (58,15): Argument of type '() => any' is not assignable to parameter of type 'Observable'. Property '_isScalar' is missing in type '() => any'.

ERROR in /Users/genilex3/Desktop/meager/angularRxjs/angularrxjs/src/app/app.component.ts (58,41): Argument of type 'number' is not assignable to parameter of type '(value: {}) => SubscribableOrPromise'.

javascriptangulartypescriptbufferrxjs

Answer №1

Utilizing bufferTime is recommended for managing your stream.

let doubleClickStream = clickStream 
      .bufferTime(250)
      .map(arr => arr.length)
      .filter(len => len === 2);

To reset the value after 1000ms of being set, you can employ the debounceTime method.

doubleClickStream.debounceTime(1000)
    .subscribe(suggestion =>{
        lab.textContent = '-';
    });

For more information on debounceTime, visit: http://reactivex.io/rxjs/class/es6/Observable.js~Observable.html#instance-method-debounceTime

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