$ ./node_modules/.bin/eslint --init
? How would you like to configure ESLint? Answer questions about your style
? Are you using ECMAScript 6 features? Yes
? Are you using ES6 modules? Yes
? Where will your code run? Browser
? Do you use CommonJS? No
? Do you use JSX? No
? What style of indentation do you use? Spaces
? What quotes do you use for strings? Single
? What line endings do you use? Unix
? Do you require semicolons? Yes
? What format do you want your config file to be in? JSON
Successfully created .eslintrc.json file in /Users/jlengstorf/dev/code.lengstorf.com/projects/learn-rollup

{
  "env": {
    "browser": true,
    "es6": true
  },
  "extends": "eslint:recommended",
  "parserOptions": {
    "sourceType": "module"
  },
  "rules": {
    "indent": [
      "error",
      4
    ],
    "linebreak-style": [
      "error",
      "unix"
    ],
    "quotes": [
      "error",
      "single"
    ],
    "semi": [
      "error",
      "always"
    ]
  }
}

{
  "env": {
    "browser": true,
    "es6": true
  },
  "globals": {
    "ENV": true
  },
  "extends": "eslint:recommended",
  "parserOptions": {
    "sourceType": "module"
  },
  "rules": {
    "indent": [
      "error",
      2
    ],
    "linebreak-style": [
      "error",
      "unix"
    ],
    "quotes": [
      "error",
      "single"
    ],
    "semi": [
      "error",
      "always"
    ]
  }
}

// Import a couple modules for testing.
import { sayHelloTo } from './modules/mod1';
import addArray from './modules/mod2';

// Import a logger for easier debugging.
import debug from 'debug';
const log = debug('app:log');

// Enable the logger.
debug.enable('*');
log('Logging is enabled!');

// Run some functions from our imported modules.
const result1 = sayHelloTo('Jason');
const result2 = addArray([1, 2, 3, 4]);

// Print the results on the page.
const printTarget = document.getElementsByClassName('debug__output')[0];

printTarget.innerText = `sayHelloTo('Jason') => ${result1}\n\n`;
printTarget.innerText += `addArray([1, 2, 3, 4]) => ${result2}`;

// Rollup plugins
import babel from 'rollup-plugin-babel';
import eslint from 'rollup-plugin-eslint';
import resolve from 'rollup-plugin-node-resolve';
import commonjs from 'rollup-plugin-commonjs';

export default {
  entry: 'src/scripts/main.js',
  dest: 'build/js/main.min.js',
  format: 'iife',
  sourceMap: 'inline',
  plugins: [
    resolve({
      jsnext: true,
      main: true,
      browser: true,
    }),
    commonjs(),
    eslint({
      exclude: [
        'src/styles/**',
      ]
    }),
    babel({
      exclude: 'node_modules/**',
    }),
  ],
};

// Rollup plugins
import babel from 'rollup-plugin-babel';
import eslint from 'rollup-plugin-eslint';
import resolve from 'rollup-plugin-node-resolve';
import commonjs from 'rollup-plugin-commonjs';
import replace from 'rollup-plugin-replace';

export default {
  entry: 'src/scripts/main.js',
  dest: 'build/js/main.min.js',
  format: 'iife',
  sourceMap: 'inline',
  plugins: [
    resolve({
      jsnext: true,
      main: true,
      browser: true,
    }),
    commonjs(),
    eslint({
      exclude: [
        'src/styles/**',
      ]
    }),
    babel({
      exclude: 'node_modules/**',
    }),
    replace({
      exclude: 'node_modules/**',
      ENV: JSON.stringify(process.env.NODE_ENV || 'development'),
    }),
  ],
};

// Rollup plugins
import babel from 'rollup-plugin-babel';
import eslint from 'rollup-plugin-eslint';
import resolve from 'rollup-plugin-node-resolve';
import commonjs from 'rollup-plugin-commonjs';
import replace from 'rollup-plugin-replace';
import uglify from 'rollup-plugin-uglify';

export default {
  entry: 'src/scripts/main.js',
  dest: 'build/js/main.min.js',
  format: 'iife',
  sourceMap: 'inline',
  plugins: [
    resolve({
      jsnext: true,
      main: true,
      browser: true,
    }),
    commonjs(),
    eslint({
      exclude: [
        'src/styles/**',
      ]
    }),
    babel({
      exclude: 'node_modules/**',
    }),
    replace({
      ENV: JSON.stringify(process.env.NODE_ENV || 'development'),
    }),
    (process.env.NODE_ENV === 'production' && uglify()),
  ],
};