asWorkerFunction.js

export default asWorkerFunction
export asWorkerFunction
export asBlobURLFunction

function asWorkerFunction(func) {
  return new Worker(asBlobURLFunction(func))
}

function asBlobURLFunction(func) {
  const rx_src = /(^.*=>|{)\s*([^]*?)(}\s*)?$/
  const f_src = rx_src.exec(func)
  const blob = new Blob([f_src[2]])
  return URL.createObjectURL(blob)
}

z_example_worker.js

import asWorkerFunction from './asWorkerFunction.js'

asWorkerFunction(() =>
  self.postMessage({
    hello: Date.now(),
    loc: location.toString(),
    loc_hash: location.hash })
).addEventListener('message', evt=>console.log('worker msg', evt.data), false)