https://github.com/iso50/step-by-step

Tiny tooling to execute Promises in a synchronous manner
https://github.com/iso50/step-by-step

array async asynchronous es6 javascript library promise synchronous

Last synced: 7 days ago
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Tiny tooling to execute Promises in a synchronous manner

• Host: GitHub
• URL: https://github.com/iso50/step-by-step
• Owner: ISO50
• Created: 2017-02-19T11:17:23.000Z (over 7 years ago)
• Default Branch: master
• Last Pushed: 2022-04-09T02:02:12.000Z (over 2 years ago)
• Last Synced: 2023-08-16T21:33:03.338Z (about 1 year ago)
• Topics: array, async, asynchronous, es6, javascript, library, promise, synchronous
• Language: JavaScript
• Size: 138 KB
• Stars: 2
• Watchers: 2
• Forks: 0
• Open Issues: 5
• Metadata Files:
  • Readme: README.md

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README

        
# step-by-step

A simple way to execute a group of ES6 promises in a synchronous manner.

## How to use

In this example a synthetic `Promise` is used to show how `runSync` works.

The input array for runSync should contain functions which return the Promises that will be executed in a synchronous way.

```javascript

const runSync = require('step-by-step').runSync;

const createPromise = (param) => {

  return () => {

    return new Promise(resolve => {

      const [planet, stopFor] = param;

      setTimeout(() => {

        console.log(planet);

        resolve(planet);

      }, stopFor);

    });

  };

};

const promiseArray = [

  createPromise(['Mercury', 220]),

  createPromise(['Venus', 100]),

  createPromise(['Earth', 1]),

  createPromise(['Mars', 150])

];

// Output: Mercury, Venus, Earth, Mars

const results = runSync(promiseArray);

// Output: [ 'Mercury', 'Venus', 'Earth', 'Mars' ]

results.then(console.log);

```

Looks a bit bulky? If all the promise factory related stuff is left out it looks way cleaner:

```javascript

const runSync = require('step-by-step').runSync;

const promises = [

  () => fetch('http://a'),

  () => fetch('http://b'),

  () => fetch('http://c')

];

runSync(promises);

```

## Changelog

* `1.0.8` - updated dev dependencies

* `1.0.6` - changed typings

* `1.0.4` - fix wrong export 😀

* `1.0.2` - add typings see #1