npm package discovery and stats viewer.

Discover Tips

  • General search

    [free text search, go nuts!]

  • Package details

    pkg:[package-name]

  • User packages

    @[username]

Sponsor

Optimize Toolset

I’ve always been into building performant and accessible sites, but lately I’ve been taking it extremely seriously. So much so that I’ve been building a tool to help me optimize and monitor the sites that I build to make sure that I’m making an attempt to offer the best experience to those who visit them. If you’re into performant, accessible and SEO friendly sites, you might like it too! You can check it out at Optimize Toolset.

About

Hi, 👋, I’m Ryan Hefner  and I built this site for me, and you! The goal of this site was to provide an easy way for me to check the stats on my npm packages, both for prioritizing issues and updates, and to give me a little kick in the pants to keep up on stuff.

As I was building it, I realized that I was actually using the tool to build the tool, and figured I might as well put this out there and hopefully others will find it to be a fast and useful way to search and browse npm packages as I have.

If you’re interested in other things I’m working on, follow me on Twitter or check out the open source projects I’ve been publishing on GitHub.

I am also working on a Twitter bot for this site to tweet the most popular, newest, random packages from npm. Please follow that account now and it will start sending out packages soon–ish.

Open Software & Tools

This site wouldn’t be possible without the immense generosity and tireless efforts from the people who make contributions to the world and share their work via open source initiatives. Thank you 🙏

© 2024 – Pkg Stats / Ryan Hefner

async-mobx

v1.1.0

Published

Get async data for MobX

Downloads

16

Readme

async-mobx

NPM downloads license
Getting async data for Mobx 3+.

Installation

npm

npm i async-mobx

yarn

yarn add async-mobx

Using

Async is a Promise like constructor

import Async from 'async-mobx'

const promise = new Async((resolve, reject) => {
  fetch('/test').then(resolve, reject)
})

then, catch, finally

then, catch and finally always return instance of Promise

const test = new Async().then() instanceof Promise
// test === true 

Use then, catch and finally like for Promise

const promise = new Async(resolve => resolve(1))
promise
  .then(value => console.log('then', value))
  .finally(value => console.log('finally', value))
  .catch(value => console.log('catch', value))

We have one specific think for mobx, if you return a function to resolve or reject then the function will be called when you need to get the result

(async () => {
  let test = true
  const promise = new Async(resolve => resolve(() => test = false))
  // test still equals true
  await promise
  // test is false
})()

You may override the result at function to fix it

(async () => {
  function test () {}
  const promise = new Async(resolve => resolve(() => test))
  const result = await promise
  return result === test // true
})()

loading

You may check status of Async with loading, it's true when data is loading

(async () => {
  const promise = new Async(resolve => setTimeout(resolve))
  // promise.loading === true
  await promise
  // promise.loading === false
})()

loaded

You may check status of Async with loaded, it's true when data was loaded at least one time

(async () => {
  const promise = new Async(resolve => setTimeout(resolve))
  // promise.loaded === false
  await promise
  // promise.loaded === true
})()

value

You may get result without await synchronously with value

const promise = new Async(resolve => resolve(1))
// promise.value === 1

But value returns result at the moment

(async () => {
  const promise = new Async(resolve => setTimeout(() => resolve(1)))
  // promise.value === undefined
  await promise
  // promise.value === 1
})()

error

You may handle error without await synchronously with error like value with resolve

const promise = new Async((resolve, reject) => reject(1))
// promise.error === 1

default

You may provide default value for Async

(async () => {
  const promise = new Async({
    request: resolve => setTimeout(() => resolve(2)),
    default: 1
  })
  // promise.value === 1
  await promise
  // promise.value === 2
})()

response

response is the same value but without default value

(async () => {
  const promise = new Async({
    request: resolve => setTimeout(() => resolve(2)),
    default: 1
  })
  // promise.value === 1
  // promise.response === undefined
  await promise
  // promise.value === 2
  // promise.response === 2
})()

update

Unlike Promise, you may reuse Async with update method

let i = 0
const promise = new Async(resolve => resolve(i++))
// i === 1
promise.update()
// i === 2

reset

The method just sets default value as current and clears error

const promise = new Async({default: 1})
promise.resolve(2) // promise.value = 2
promise.reset() // promise.value = 1

resolve

You may use resolve to say async that loading is finished successfully

const promise = new Async()
promise.resolve(1)
// promise.value === 1

reject

You may use reject to say async that loading is finished with error

const promise = new Async()
promise.reject(1)
// promise.error === 1

on, once, off

You may add a listener to react on events.
Use resolve, reject or update as a type of event.

const promise = new Async()
let test = false
promise.on('resolve', () => test = promise.value)
// test === false
promise.resolve(true)
// test === true
promise.resolve(false)
// test === false

You may add a listener which reacts only once with once

const promise = new Async()
let test = false
promise.once('resolve', () => test = promise.value)
// test === false
promise.resolve(true)
// test === true
promise.resolve(false)
// test === true

You may turn off a listener

const promise = new Async()
let test = false
const listener = () => test = promise.value
promise.on('resolve', listener)
// test === false
promise.resolve(true)
// test === true
promise.off('resolve', listener)
promise.resolve(false)
// test === true

Issues

If you find a bug, please file an issue on GitHub
issues


stars watchers