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@jahed/promises

v1.0.2

Published

Functions for Promises

Downloads

7,857

Readme

@jahed/promises

Travis npm Patreon Liberapay

Functions for Promises. Use Promises as control flow and worry less about what's asynchronous and what isn't.

Changing a component from sync to async should not require a large rewrite. By using functions, we can abstract those differences out for a more consistent and flexible approach.

Useful Links

Installation

# Yarn
yarn add @jahed/promises

# NPM
npm install @jahed/promises

Usage

See the documentation and src/[function].test.js for usage examples.

Here's a bigger abstract example using multiple functions together.

import { 
  compose, 
  relay, 
  not, 
  branch, 
  waterfall, 
  every, 
  doNothing 
} from '@jahed/promises'

const setup = waterfall(
  input => getEnvironment(input),
  relay(
    env => clear(env),
    env => make(env)
  )
)

const doSomething = compose(
  relay(
    input => not(alreadyDidIt(input))
  ),
  branch(
    compose(
      waterfall(
        input => every({
          input: input,
          env: setup(input)
        }),
        args => doSomethingBigger(args)
      ),
      branch(
        result => {
          console.log('did something big', { result })
        },
        error => {
          console.error('failed hard.', error)
          process.exit(1)
        }
      )
    ),
    doNothing()
  )
)

doSomething('input')

Contributions

This package is a work-in-progress and will grow as more needs arise.

Is there a function or use-case you have that's not covered by this package? Submit an issue or pull request with your ideas and let's discuss!

License

See LICENSE file.