Immview NPM | npm.io

Immview 3

Immview is a library to create Domains - non-visual components - similar to flux stores, exposing their state (through Atoms) or emitting signals (through Observables) and having specific to their concerns actions. Their primary role is to encapsulate a concern and to be the only thing exported from a javascript module or modules that deal with the concern.

It completely replaces any flux implementation or Redux, although surely could be integrated with one easily.

All Domains must be provided with a single stream of values (Atom or Observable class instance), but not all Observables and Atoms must be attached to a Domain - you can perform many transformations on a source before it is exposed through a Domain. These transformations are done with operators - functions that exist on these classes prototypes.

TypeScript

Immview has been built with TypeScript. You do not have to use it, but some editors may offer better experience.

For RxJS users

If you are familiar with RxJS (especially v5), an Immview taste of Observable does not have a different meaning or role, although behaviour differs slightly as it is more similar to RxJS's Subject - you can have many observers for one Observable or Atom. Also, just as RxJS 5, it mimics TC39 Observable proposal interface.

Quick overview

const Foos = new Observable()
const FooSenderDomain = Domain.create(Foos, {
  send() {
    Foos.next('foo')
  }
})

// register observers
FooSenderDomain.subscribe(v => console.log(v))
FooSenderDomain.map(v => v + 'bar').subscribe(v => console.log(v))

FooSenderDomain.send()
// prints: foo
// prints: foobar