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Modern JavaScript Applications

You're reading from   Modern JavaScript Applications Keep abreast of the practical uses of modern JavaScript

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Product type Paperback
Published in Jul 2016
Publisher Packt
ISBN-13 9781785881442
Length 330 pages
Edition 1st Edition
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Author (1):
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Narayan Prusty Narayan Prusty
Author Profile Icon Narayan Prusty
Narayan Prusty
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Table of Contents (16) Chapters Close

Preface 1. Breaking into Microservices Architecture FREE CHAPTER 2. Building a Coupon Site 3. Communication between Browsers in Real Time 4. Building a Chatroulette 5. Bidirectional Communication in Real Time 6. Building a Live Score Site 7. Functional Reactive Programming 8. Building an Advanced Profile Search Widget 9. New Features of Bootstrap 4 10. Building User Interfaces Using React 11. Building an RSS Reader Using React and Flux 12. New Features of Angular 2 13. Building a Search Engine Template Using AngularJS 2 14. Securing and Scaling Node.js Applications Index

Subscribing to the end of EventStreams and properties


Bacon provides the onEnd method to subscribe to callbacks that will be executed when an EventStream or property ends.

Here is some example code, which shows you how to use the onEnd callback. Place it in the index.js file:

script_start_time.onEnd(function(){
  console.log("Script start time has been successfully calculated and logged");
})

Here, we are attaching an onEnd callback to the constant property, which we created previously. After initialization, the property is ended; therefore, the onEnd callback is invoked. We can register multiple subscribers as well.

Actually, to end an EventStream or property, Bacon internally pushes an instance of the Bacon.End constructor. So, we can also use the Bacon.End constructor to end an EventStream or property.

Let's look at an example of how to use Bacon.End. Place this code in the index.js file:

var custom_stream = Bacon.fromBinder(function(sink) {
  sink(10);
  sink(20);
  sink(new Bacon.End());...
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