How to download (require) a package that is not installed?

Question

Node.js

Let's say there is package1 in the NPM registry.
His name will be known only during the execution or installation of my script.
For example, when installing my script, its config will contain a list of packages that need access (their APIs are the same, for example, all packages export getFunctions).
From my script, I want to access it without setting:

const packageName = 'package1'; // Имя пакета заранее не известно.
const pkg = require(packageName);
const pkgFunctionList = pkg.getFunctions();

Is it possible to access a package without installing the 'npm install' view?

Answer 1

Something like this

const { exec } = require('child_process');

try {
  require('nnn');
} catch (e) {
  if (e.code === 'MODULE_NOT_FOUND') {
    exec('npm i nnn', (err, stdout) => {
      if (err) {
        console.error(err);
      }

      console.log(stdout);
    });
  }
}

or install them in postinstall ?

Answer 2

Theoretically, you can install via exec the package globally and import using https://github.com/sindresorhus/import-global