https://github.com/staltz/callbag-subject

👜 A callbag listener sink which is also a listenable source
https://github.com/staltz/callbag-subject

Last synced: 5 days ago
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👜 A callbag listener sink which is also a listenable source

• Host: GitHub
• URL: https://github.com/staltz/callbag-subject
• Owner: staltz
• Created: 2018-02-01T16:17:40.000Z (almost 7 years ago)
• Default Branch: master
• Last Pushed: 2023-04-20T07:01:50.000Z (over 1 year ago)
• Last Synced: 2024-12-22T04:46:52.742Z (22 days ago)
• Language: JavaScript
• Homepage:
• Size: 24.4 KB
• Stars: 27
• Watchers: 5
• Forks: 5
• Open Issues: 2
• Metadata Files:
  • Readme: readme.md

Awesome Lists containing this project

• awesome-callbags - subject

README

        
# 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

```js

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(x + 1))(subject);

// First observer is added after 2.5 seconds

setTimeout(() => {

  observe(x => console.log(x + 2))(subject);

}, 2500);

// a1

// a1

// a1

// a2

// a1

// a2

// ...

```