function-exec-sync

Run an exported function in a Node.js process and return its value.

npm install function-exec-sync

Create worker.cjs:

module.exports = function (name, count) {
  return Array(count + 1).join(name);
};

Call it from another CommonJS file:

var path = require('path');
var call = require('function-exec-sync');

var result = call(path.join(__dirname, 'worker.cjs'), 'ha', 2);
console.log(result); // "haha"

Pass execPath in an options object to select a Node executable:

var result = call({ execPath: '/path/to/node' }, path.join(__dirname, 'worker.cjs'), 'ha', 2);

The target module, arguments, and returned value cross a process boundary, so keep them serializable by this package. Circular values are not supported.

Error values retain their names, messages, stacks, enumerable diagnostic fields, and own cause and errors fields. AggregateError values use the receiving runtime's native constructor when available. Older Node versions receive a local Error retaining the aggregate data. Other Error subclass prototypes are not preserved. A directly returned Error is treated as a failure; return an ordinary container such as { error: error } to include an Error in a successful result.

Documentation

API Docs