es-decorate

ES7 decorators for CoffeeScript

Why

Libraries such as Angular and Aurelia are starting to use decorators according to the API proposed in https://github.com/wycats/javascript-decorators which is supported in Babel 5+ and TypeScript 1.5

On the other hand, it seems CoffeeScript won't be adding decorators any time soon:

• jashkenas/coffeescript#76
• jashkenas/coffeescript#996

es-decorate fills the syntactic gap providing a helper function that can apply decorators compliant with the proposed decorator API.

Install

npm install --save es-decorate

Usage

Following the examples in https://github.com/wycats/javascript-decorators:

decorate = require 'es-decorate'

# Class decorator must be assigned to variable or property.
Foo = decorate F('color'), G, class #  Class name is optional in CoffeeScript

  # Method with redundant name
  bar: decorate 'bar', @, F('color'), G, ->

  # Or just...
  decorate 'baz', @, F('color'), G, ->
  #  ...if no code analyzer will miss the explicit method declaration

Multiline declaration:

Foo = decorate [
  F 'color'
  G
  H
  I 123
  J
  ], class Foo

Less dumb example, using Angular 2:

decorate = require 'es-decorate'
{Component, View} = require 'angular2/angular2'

AppComponent = decorate [
  Component selector: 'my-app'
  View template: '<h1>My first Angular 2 App</h1>'
], class AppComponent
  constructor: ->