metavm

Metarhia script loader, node.js vm wrapper

Create script from string

Script contains object expression. You can use it for configs, network packets, serialization format, etc.

const metavm = require('metavm');

const src = `({ field: 'value' });`;
const ms = metavm.createScript('Example', src);
console.log(ms);

Output:

MetaScript {
  name: 'Example',
  script: Script {},
  context: {},
  exports: { field: 'value' }
}

Script contains function expression. You can use it for api endpoints, domain logic stored in files or database, etc.

const metavm = require('metavm');

const src = `(a, b) => a + b;`;
const ms = metavm.createScript('Example', src);
console.log(ms);

Output:

MetaScript {
  name: 'Example',
  script: Script {},
  context: {},
  exports: [Function]
}

Read script from file

const metavm = require('.');

(async () => {
  const ms = await metavm.readScript('./test/examples/simple.js');
  console.log(ms);
})();

Output:

MetaScript {
  name: 'simple',
  script: Script {},
  context: {},
  exports: { field: 'value', add: [Function: add], sub: [Function: sub] }
}

License & Contributors

Copyright (c) 2020-2023 Metarhia contributors. Metavm is MIT licensed.
Metavm is a part of Metarhia technology stack.

Changelog

[1.4.2][] - 2024-08-31

• Update eslint to 9.x and prettier with configs
• Add node.js 22 to CI
• Update dependencies
• Update dotfiles, configs, scripts and repo maintenance