Inlining objects in Javascript.

serialize.js

// Recursively inlines Function, RegExp and undefined.
  function serialize(value) {
    const type = typeof value;
    const json = JSON.stringify;

    if(type === 'function') {
      return value.toString();
    }
    if(type === 'object') {
      if(value === null) {
        return json(value);
      }
      if(value instanceof RegExp) {
        return value.toString();
      }
      if(Array.isArray(value)) {
        return '[' + value.map(serialize).join(',') + ']';
      }
      const body = Object.keys(value).map(name => json(name) + ':' + serialize(value[name]));
      return '{' + body.join(',') + '}';
    }
    if(type === 'undefined') {
      return type;
    }
    return json(value);
  }

z_example.js

function createWorker(data, onInit) {
  const script = `
	'use strict';
	const data = ${serialize(data)};
	(${onInit.toString()}).call(this, self, data);
  `;
  const blob = new Blob([script], {type: 'text/javascript'});
  const worker = new Worker(URL.createObjectURL(blob));
  
  return worker;
}