What are practical use cases for JavaScript Streams

Question

I'm been learning how to use JavaScript 'node-style' streams using Bacon.js. Namely, I've been looking at the Bus EventStreams.

It all looks very interesting and I'm sure that JavaScript streams have a multitude of great use cases, but I can't seem to think of a single practical application.

Can anyone provide me with some examples of use cases for Streams?

What practical use case are you trying to solve? We'll show you how to do it with streams. — Bergi, Apr 05 '17 at 16:17
I don't have any specific problems to solve that I feel streams can solve, hence my question — Adam McKenna, Apr 05 '17 at 16:19
Not one where *you feel* that streams would solve it, but just some arbitrary specific problem (preferably complex enough to need asynchronous events). — Bergi, Apr 05 '17 at 19:45

score 1 · Accepted Answer · answered Apr 05 '17 at 15:01

I used it to handle key events, update values in near real time via Server Side Push/Web socket, and combine with other events to determine a behavior to act upon (ex. if the page has focus when a web socket event fires, update a field..).

Here are a few more...

Determine if user is active on a page -

var blur = $(window).asEventStream('blur').map(function() { return false; });
var focus = $(window).asEventStream('focus').map(function() { return true; }); 
var focused = focus.merge(blur).toProperty(true);

via http://blog.flowdock.com/2013/01/22/functional-reactive-programming-with-bacon-js/

TypeAhead - See movie search example at https://baconjs.github.io/

Registration Form, Shopping Cart - see https://baconjs.github.io/tutorials.html

Handling Web Socket Connections/Events - http://blog.carbonfive.com/2014/09/23/bacon-js-node-js-mongodb-functional-reactive-programming-on-the-server/ and https://medium.com/@garychambers108/functional-reactive-react-js-b04a8d97a540

What are practical use cases for JavaScript Streams

1 Answers1