simple amd loader

worker.js

import zipObject from 'lodash/zipObject'
import memoize from 'lodash/memoize'

const loadModules = memoize((modules) => {
  // prevent node style export
  const exports = undefined
  const module = undefined

  const resultModules = []
  const resultNames = []

  const define = (...args) => {
    const factory = args[args.length - 1]
    resultModules.push(typeof factory == 'function' ? factory() : factory)
  }
  define.amd = {}

  for (const moduleName in modules) {
    eval(modules[moduleName])
    // iteration order is not guarantied, so we have to push names in the same order as modules
    resultNames.push(moduleName)
  }

  return zipObject(resultNames, resultModules)
})