Defered Modules

DeferedModules.js

// Deferred Labeled Modules.js

require: 'Foo';

function LoadSomething(){

  var a = 'A'; // Synchronous
  alert('Will now start loading the Foo module');

  defer: {
    a = ImportedFromFoo(a); // The module 'Foo' is optionally deferred asynchronously, because the binding is only used here
    alert('Done');
  }

}

// Deferred Labeled Modules - Desugared.js

function LoadSomething(){

  var a = 'A';
  alert('Will now start loading the Foo module');

  PRELOAD_MODULE('Foo', function(){
    a = require('Foo').ImportedFromFoo(a);
    alert('Done');
  });

}

// ES.next syntax?

function LoadSomething(){

  var a = 'A'; // Synchronous
  alert('Will now start loading the Foo module');

  defer { // Asynchronous
    import * from 'Foo';
    a = ImportedFromFoo(a); // Possible optimization problem, late binding scoped variable
    alert('Done');
  }

}