promises-chain

The execution of the promises chain

Promise.chain is actually a promise that takes an array of anonymous function with promises as an input (an iterable). Return an array of promises results

Install

npm i promises-chain

let Promise1 = () => new Promise((resolve, reject) => {
  setTimeout(() => {
    resolve()
  }, 1000);
})
...
 
Promise.resolve(Promise1)
  .then(Promise2)
  .then(Promise3)
  .then(Promise4)
  
Promise.chain([Promise1, Promise2, Promise3, Promise4])

Example:

const promisesChain = require('promises-chain');
 
Promise.chain([1,2,3,4,5].map(i => function(){
  return new Promise((resolve, reject) => {
    setTimeout(() => {
      console.log(i);
      resolve(i*10)
    }, 1000)
  })
}))
.then(result => {
  console.log('finish', result); // finish [ 10, 20, 30, 40, 50 ]
})
.catch(err => {
  console.log('error', err)
})