CoffeeScript

CoffeeScript is a language that transpiles to JavaScript, which allows you to use a shorter syntax and other features like the existential operator, shorter array-splicing syntax, block regular expressions and more.

Parcel supports CoffeeScript using the @parcel/transformer-coffeescript plugin. To use it, install it into your app and add it to your .parcelrc.

yarn add @parcel/transformer-coffeescript@next --dev

.parcelrc:

{
  "extends": "@parcel/config-default",
  "transformers": {
    "*.coffee": ["@parcel/transformer-coffeescript"]
  }
}

CoffeeScript is compiled to JavaScript and processed as described in the JavaScript docs.

Example usage

index.html:

<script type="module" src="app.coffee"></script>

app.coffee:

console.log 'Hello world!'