https://github.com/franciscotln/callbag-rescue

Callbag operator that rescues a failed source
https://github.com/franciscotln/callbag-rescue

Last synced: 18 days ago
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Callbag operator that rescues a failed source

• Host: GitHub
• URL: https://github.com/franciscotln/callbag-rescue
• Owner: franciscotln
• License: mit
• Created: 2018-03-18T18:11:40.000Z (over 6 years ago)
• Default Branch: master
• Last Pushed: 2019-02-17T16:53:35.000Z (over 5 years ago)
• Last Synced: 2024-09-14T15:48:24.769Z (about 2 months ago)
• Language: JavaScript
• Size: 9.77 KB
• Stars: 6
• Watchers: 2
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: readme.md
  • License: LICENSE

Awesome Lists containing this project

• awesome-callbags - rescue

README

        
# callbag-rescue

Callbag higher-order operator that rescues a failed source. Works on either pullable or listenable sources.

`npm install callbag-rescue`

## examples

### listenables

After a failed promise, rescue with a new Callbag source:

```js

 const forEach = require('callbag-for-each');

 const fromPromise = require('callbag-from-promise');

 const of = require('callbag-of');

 const map = require('callbag-map');

 const pipe = require('callbag-pipe');

 const rescue = require('callbag-rescue'); 

pipe(

  fromPromise(Promise.reject({ status: 404 })),

  map(res => res.body),

  rescue(err => of({ type: 'ERROR', payload: err })),

  forEach(n => {

    console.log(n); // { type: 'ERROR', payload: { status: 404 } }

  })

);

```

### pullables

After a source Callbag throws an error, rescue it:

```js

const forEach = require('callbag-for-each');

const fromIter = require('callbag-from-iter');

const map = require('callbag-map');

const of = require('callbag-of');

const pipe = require('callbag-pipe');

pipe(

  fromIter([1, 2]),

  map(num => num.a.name),

  rescue(err => of({ type: 'ERROR', payload: err.message })),

  forEach(n => {

    console.log(n); // { type: 'ERROR', payload: 'Cannot read property "name" of undefined' }

  })

);

```