ccorcos / elmish

A Javascript UI library inspired by Elm

Elmish

This is functional programming pattern inspired by the Elm Architecture for building user interfaces.

To get it running:

git clone https://github.com/ccorcos/elmish.git
cd elmish
npm install
ln -s .. node_modules/elmish
node server.js
open http://localhost:3000/

Check out entry.js to select the example you want to run and work your way through the tutorial.

Goals

• Abstraction
  • It should be trivial to reuse UI components without rewriting them.
  • You should be able to create N instances of your app side-by-side without iframes.
  • Virtual DOM and data fetching requests ought to composable.
• Pure, Stateless, and Declarative
  • The UI should be a pure function of state.
  • There should be no side-effects tied to the render cycle.
  • Declare what your want, not how to do it.
  • No global variables.
• Serializable States and Actions
  • Trivial event tracking
  • Send states and actions to the server on any runtime exceptions.
  • Record user sessions and run predictive testing.
  • Time-travelling debugger.
  • Record and save flows to different corners of the app.
  • Generative testing by using the app.