moonscript-loader is a webpack4 loader for compiling MoonScript to Lua. It is intended to be used with fengari.io/fengari-loader (but if you find another way to run Lua go ahead).

This is just an example setup - webpack is very flexible. Don't assume any of these extra dependencies are necessary.

install dependencies:

touch package.json && npm i --save-dev webpack webpack-dev-server fengari-loader fengari-web moonscript-loader html-webpack-plugin

set up your webpack config (webpack.config.js):

const HtmlWebpackPlugin = require('html-webpack-plugin');

module.exports = {
  context: __dirname,
  entry: './toast.moon',
  mode: 'development',
  module: {
    rules: [
      {
        test: /\.moon$/,
        use: [
          'fengari-loader',
          'moonscript-loader',
        ]
      },
    ]
  },
  plugins: [
    new HtmlWebpackPlugin(),
  ],
}

write some Moonscript (toast.moon):

window = js.global

y = (x) -> x * 2
window.console\log y 14

run everything and visit http://localhost:8080 :)

node_modules/.bin/webpack-dev-server -w