magicRequire.js

var magicRequire = function(moduleName) {
  return new Promise(function(resolve, reject) {
    var scriptTag = document.createElement('script');
    scriptTag.src = 'https://www.brcdn.org/' + moduleName + '/latest';
    
    document.body.appendChild(scriptTag);
    
    scriptTag.addEventListener('load', function() {
      if (!window.require) {
        reject(new Error('require function not found'));
        return;
      }
      
      console.log('Loaded', moduleName);
      window[moduleName] = require(moduleName);
      resolve(window[moduleName]);
    });
    
    scriptTag.addEventListener('error', reject);
  });
};