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Another ES6 promise implementation (compliant with Promises/A+)

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Parole

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Another ES6 promise implementation (compliant with Promises/A+)

ᴋɪʟᴛ ᴊs npm Build Status codecov GitHub license

Installation

npm install parole

# alternatively you can use bower (minified version by default)
yarn add parole

ES6 fulfill

Parole implements ES6 Promise specs

Implements:

  • Promise.prototype.then
  • Promise.prototype.catch
  • Promise.prototype.finally

Also static methods

  • Promise.resolve
  • Promise.reject
  • Promise.all
  • Promise.allSettled
  • Promise.any
  • Promise.race

Includes:

  • Promise.defer
// parole respects the es6 promise specification
// you can use parole as global polyfill

if( !window.Promise ) {
  window.Promise = Parole;
}

Example

new Parole((resolve, reject) => {
    resolve('gogogo!')
  })

  .then((result) => {
    console.log('checkpoint 1', result)
    throw 'whoops!'
  })

  .then(
    (result) => {
      console.log('checkpoint 2', result)
    },
    (result) => {
      console.log('checkpoint 2.1', result)
      return new Parole((resolve, reject) => {
        setTimeout(() => resolve('all right!'), 400)
      })
    },
  )

  .then(
    (result) => console.log('checkpoint 3', result),
    (reason) => console.log('checkpoint 3.1', reason),
  )
;

output

checkpoint 1 gogogo!
checkpoint 2.1 whoops!
# elapsed 400ms
checkpoint 3 all right!

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Another ES6 promise implementation (compliant with Promises/A+)

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