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From: Thomas 'PointedEars' Lahn <PointedEars@web.de>
Newsgroups: comp.lang.javascript
Subject: Re: Exposing a module in the current scope
Date: Tue, 23 Mar 2021 01:00:34 +0100
Organization: PointedEars Software (PES)
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Xref: csiph.com comp.lang.javascript:39743

Anton Shepelev wrote:

>    $.import("anton_test/util.xsjslib","util"); // import module
>    $.anton_test.util.log("Log from library."); // invoke a function
> 
> Is it somehow possible to have all the functions from `util'
> available in the current scope, so that I could invoke them
> by their names: log("Hello"), rather than, say,
> util.log("Hello"), 

(Again: No.)

But an alternative standard-compliant and backwards-compatible way is what 
has been called an IEFE (“immediately executed function expression”) or a 
simiilar term:

  $.import("anton_test/util.xsjslib","util"); // import module
  $.anton_test.util.log("Log from library."); // invoke a function

  (function (log) {
    /* … */
  }($.anton_test.util.log));

The same caveat applies above as for

  const log = $.anton_test.util.log;

which is why typically one writes

  (function (util) {
    util.log("Log from library.");
  }($.anton_test.util));

BTW, I would expect the module loader of such a module system to return, if 
successful, a reference to the module object such that – if synchronous 
execution cannot be avoided – the following code would be equivalent to the 
code above:

  const util = $.import("anton_test/util.xsjslib","util");
  util.log("Log from library.");

In asynchronous module loading, typically the module object is passed as 
argument to the callback:

  $.import("anton_test/util.xsjslib", function (util) {
    util.log("Log from library.");
  });

-- 
PointedEars
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