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https://github.com/theodesp/fetch-future
A fetch that returns Futures instead of Promises
https://github.com/theodesp/fetch-future
assert fetch futures mocha monad
Last synced: about 1 month ago
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A fetch that returns Futures instead of Promises
- Host: GitHub
- URL: https://github.com/theodesp/fetch-future
- Owner: theodesp
- License: mit
- Created: 2017-03-24T11:25:06.000Z (over 7 years ago)
- Default Branch: master
- Last Pushed: 2024-01-02T15:51:37.000Z (11 months ago)
- Last Synced: 2024-10-03T07:21:21.416Z (about 2 months ago)
- Topics: assert, fetch, futures, mocha, monad
- Language: JavaScript
- Size: 169 KB
- Stars: 4
- Watchers: 2
- Forks: 1
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
README
# [](#fetch-future)
> Use fetch as a Monadic Future
# What? Fetch the future?
No just use fetch that returns a Future instead of a promise.
- **Minimal:** just `fetch()` with headers and text/json/xml responses
- **Modern:** written in ES2015
- **Cancellable** you can cancel the fetch once dispatched
- **Add your own Future** you can add your own Future Library as long as it implements the
- **Monadic**
> 🤔 **What's Not there?**
>
> - Uses simple Arrays instead of Iterables
> - No streaming, just Futurizes existing XMLHttpRequest response bodies
For more information about Futures see:
* [Comparison of Futures to Promises](https://github.com/fluture-js/Fluture/wiki/Comparison-to-Promises)
Usage
> yarn install https://github.com/theodesp/fetch-future.git
add your future flavor
> yarn add fluture // or data.task but no ramda-fantasy as it cannot abort!
Example
-------
### Fetch some objects from an api
```js
import { fetchF } from 'fetch-future';
import Future from 'fluture';
const fetch = fetchF(Future);
fetch('https://jsonplaceholder.typicode.com/posts')
.chain(res => res.json()) // json() is also a Future!
.fork(console.error, console.log) // Future Fantasy!
```
### Cancel a future!
# [](#cancel)
```js
import { fetchF } from 'fetch-future';
import Future from 'fluture';
const fetch = fetchF(Future);
const future = fetch('https://jsonplaceholder.typicode.com/posts')
.chain(res => res.json()) // json() is also a Future!
.fork(console.error, console.log) // Future to be resolved!
future.cancel(); // Aborts the fetch by calling cancel!
```
## Fetch Caveats
* By default, fetch **won't send or receive any cookies** from the server, resulting in unauthenticated
requests if the site relies on maintaining a user session.
```js
fetch('/posts', {
credentials: 'include'
});
```
* The Promise returned from fetch() won't reject on HTTP error status
even if the response is an HTTP 404 or 500.
Instead, it will resolve normally, and it will only reject
on network failure or if anything prevented the request from completing.
## API
```hs
fetchF :: Constructor -> CPS -> ( (input, options) -> Future )
```
## License
MIT © [theodesp](https://theodesp.github.io)