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callbag-subject
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2.1.0 • Public • Published

callbag-subject

A callbag listener sink which is also a listenable source, and maintains an internal list of listeners. Use this like you would use RxJS Subject.

npm install callbag-subject

example

First call makeSubject to create a subject which is then a normal callbag, so:

  • Call it with args (1, data) to send data into the subject
  • Call it with args (2, err) to send an error into the subject
  • Call it with args (2) to make the subject complete
const observe = require('callbag-observe');
const makeSubject = require('callbag-subject');
 
const subject = makeSubject();
 
setInterval(() => { subject(1, 'a'); }, 1000);
 
// First observer is added immediately
observe(x => console.log(+ 1))(subject);
 
// First observer is added after 2.5 seconds
setTimeout(() => {
  observe(x => console.log(+ 2))(subject);
}, 2500);
 
// a1
// a1
// a1
// a2
// a1
// a2
// ...

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Install

npm i callbag-subject

Weekly Downloads

6,539

Version

2.1.0

License

MIT

Unpacked Size

6.7 kB

Total Files

6

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Collaborators

  • staltz