Async require library from URL for Node

node-require-url.js

const https = require('https');
const vm = require('vm');


const requireCache = {};
const requireUrl = url => new Promise((resolve, reject) => url in requireCache ?
  resolve(requireCache[url]) :
  https.get(url, res => {
    const result = [];
    res.on('data', chunk => result.push(chunk.toString('utf-8')));
    res.on('error', reject);
    res.on('end', () => {
      const sandbox = {};
      vm.createContext(sandbox);
      try {
        vm.runInContext(result.join(''), sandbox);
      } catch (error) {
        reject(error);
        return;
      }
      Object.assign(requireCache, {[url]: sandbox});
      resolve(requireCache[url]);
    });
  }));

const run = async () => {
  const {jsyaml} = await requireUrl('https://unpkg.com/[email protected]/dist/js-yaml.js');
  console.log(`yaml`, jsyaml.load(`
     hello: world
  `));
};


run();