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Running in the current context of an app with a module.

See original GitHub issue

I have been looking into the source for bytenode and was able to modify the runBytecode to support running a module. When I run in the global context I can not access the variables in the module. I would like to be able to call functions inside of the file even when it is compiled as a module.


const hello = "";

function testfunc(paramater) {
	paramater = paramater + 'hello';
	return paramater;

function testfunc2(number, number2) {
	return number * number2;


That compiles using:

const bytenode = require('bytenode');

    filename: 'encode.js',
    compileAsModule: true

I sorta hacked something together for the implementation, this is NOT going into production and simply for personal experiments ONLY, please understand this:

const runBytecode = function (bytecodeBuffer) {

  if (!Buffer.isBuffer(bytecodeBuffer)) {
    throw new Error(`bytecodeBuffer must be a buffer object.`);


  let length = readSourceHash(bytecodeBuffer);

  let dummyCode = "";

  if (length > 1) {
    dummyCode = '"' + "\u200b".repeat(length - 2) + '"'; // "\u200b" Zero width space

  const c = new vm.Script(dummyCode, {
    cachedData: bytecodeBuffer
  c.runInNewContext(global)(module.exports, require, module, __filename, __dirname, process, global);
  console.log(global) // Does not log the functions 'testfunc' and 'testfunc2'
  // Successfully runs and logs the output, though.

  /*if (script.cachedDataRejected) {
    throw new Error('Invalid or incompatible cached data (cachedDataRejected)');

  return //script.runInThisContext();

Any input would help!

Issue Analytics

  • State:closed
  • Created 2 years ago
  • Reactions:1
  • Comments:6

github_iconTop GitHub Comments

aarock1234commented, Apr 15, 2021

I apologize for the late response. I will look into it and get back to you.

Any updates? 😄

Haven’t had a chance yet, sorry. I’m assuming it is not urgent, is it?

Not urgent, take your time, just curious.

OsamaAbbascommented, Apr 6, 2021

I apologize for the late response. I will look into it and get back to you.

Read more comments on GitHub >

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