Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]


Groups > comp.lang.javascript > #39743

Re: Exposing a module in the current scope

Path csiph.com!3.eu.feeder.erje.net!feeder.erje.net!news.mb-net.net!open-news-network.org!.POSTED.178.197.213.187!not-for-mail
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)
Lines 52
Message-ID <1777535.tdWV9SEqCh@PointedEars.de> (permalink)
References <20210318192107.08e2fac2d6aeada5596c4dd0@freeshell.de>
Reply-To Thomas 'PointedEars' Lahn <cljs@PointedEars.de>
Mime-Version 1.0
Content-Type text/plain; charset="UTF-8"
Content-Transfer-Encoding 8Bit
Injection-Info gwaiyur.mb-net.net; posting-host="178.197.213.187"; logging-data="24838"; mail-complaints-to="abuse@open-news-network.org"
User-Agent KNode/4.14.10
Cancel-Lock sha1:zenE0YOYDN8//AOkzbr38oDodJA=
X-Face %i>XG-yXR'\"2P/C_aO%~;2o~?g0pPKmbOw^=NT`tprDEf++D.m7"}HW6.#=U:?2GGctkL,f89@H46O$ASoW&?s}.k+&.<b';Md8`dH6iqhT)6C^.Px|[=M@7=Ik[_w<%n1Up"LPQNu2m8|L!/3iby{-]A+#YE}Kl{Cw$\U!kD%K}\2jz"QQP6Uqr],./"?;=4v
X-User-ID U2FsdGVkX1/rnX0673QS/B/OWfOuMfQmktnJ959UPGRPkPnenNfaCA==
Face 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
Xref csiph.com comp.lang.javascript:39743

Show key headers only | View raw


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
FAQ: <http://PointedEars.de/faq> | <http://PointedEars.de/es-matrix>
<https://github.com/PointedEars> | <http://PointedEars.de/wsvn/>
Twitter: @PointedEars2 | Please do not cc me./Bitte keine Kopien per E-Mail.

Back to comp.lang.javascript | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread


Thread

Exposing a module in the current scope Anton Shepelev <antonius@freeshell.de> - 2021-03-18 19:21 +0300
  Re: Exposing a module in the current scope Anton Shepelev <anton.txt@gmail.com> - 2021-03-18 23:57 +0300
    Re: Exposing a module in the current scope "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2021-03-18 18:45 -0700
      Re: Exposing a module in the current scope Anton Shepelev <anton.txt@g{oogle}mail.com> - 2021-03-19 18:11 +0300
        Re: Exposing a module in the current scope Anton Shepelev <anton.txt@g{oogle}mail.com> - 2021-03-19 19:08 +0300
          Re: Exposing a module in the current scope "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2021-03-19 10:51 -0700
            Re: Exposing a module in the current scope Anton Shepelev <anton.txt@gmail.com> - 2021-03-20 13:32 +0300
              Re: Exposing a module in the current scope "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2021-03-20 09:53 -0700
        Re: Exposing a module in the current scope "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2021-03-19 10:47 -0700
          Re: Exposing a module in the current scope Anton Shepelev <anton.txt@gmail.com> - 2021-03-20 13:51 +0300
            Re: Exposing a module in the current scope "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2021-03-20 09:59 -0700
              Re: Exposing a module in the current scope Anton Shepelev <anton.txt@g{oogle}mail.com> - 2021-03-24 20:43 +0300
          Re: Exposing a module in the current scope Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2021-03-22 21:14 +0100
            Re: Exposing a module in the current scope "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2021-03-22 16:00 -0700
              Re: Exposing a module in the current scope Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2021-03-23 01:11 +0100
              Re: Exposing a module in the current scope Anton Shepelev <anton.txt@gmail.com> - 2021-04-04 00:31 +0300
  Re: Exposing a module in the current scope "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2021-03-18 11:30 -0700
  Re: Exposing a module in the current scope Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2021-03-22 21:05 +0100
  Re: Exposing a module in the current scope Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2021-03-23 01:00 +0100
    Re: Exposing a module in the current scope Anton Shepelev <anton.txt@g{oogle}mail.com> - 2021-03-23 20:06 +0300
      Re: Exposing a module in the current scope Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2021-03-25 20:04 +0100
        Re: Exposing a module in the current scope John G Harris <niam@jghnorth.org.uk.invalid> - 2021-03-26 08:32 +0000
        Re: Exposing a module in the current scope John G Harris <niam@jghnorth.org.uk.invalid> - 2021-03-26 08:48 +0000
  Re: Exposing a module in the current scope Anton Shepelev <anton.txt@g{oogle}mail.com> - 2021-04-13 18:49 +0300

csiph-web