vmod

Virtual module for node.js - vmod

• Runs in different script context than your current script;
• Executes a string of code in require-like environment;
• Allows you to override globals of the sandbox environment;
• Returns module.exports output;
• Throws errors that can be caught in your current context;

Known limitations:

• console.log, console.warn, console.error, etc. output not visible;
• Modifications to prototypes of some globals not visible in the vmod context;
• Only CommonJS modules supported;

Installation

$ npm install vmod --save

Simple

const vmod = require('vmod');

console.log(
  vmod('module.exports = 123;')
); // 123

Export function

const vmod = require('vmod');

console.log(
  vmod(
    'module.exports = () => "yay!";'
  )()
); // "yay!"

Require External file

/*
./_test-file.js:
module.exports = "test file data";
*/

const vmod = require('vmod');

console.log(
  vmod(
    'module.exports = require("./_test-file.js")'
  )()
); // "test file data"

Override sandbox variable

const vmod = require('vmod');

vmod(
  'module.exports = require("./_test-file.js")',
  { require: null }
); // TypeError: require is not a function