Node.js recipe for an index.js file that exports all other .js files in the same directory.

index.js

'use strict';

const fs = require('fs');

const JS_FILE = /^((?!(index)).)*\.js$/;
const JS_FILE_EXTENSION = /\.js$/;

fs.readdirSync(__dirname)
  .filter(file => JS_FILE.test(file))
  .forEach(file => exports[file.replace(JS_FILE_EXTENSION, '')] = require(`./${file}`));