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Re: 30 Years Of JavaScript

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Mikko wrote:
> On 24/04/2025 04:52, Lawrence D'Oliveiro wrote:
>> Truthiness: yes, this is a pitfall, too. Languages should just take
>> the Pascal route and insist that conditions be of Boolean type.
> 
> Fortunatly conditions are usually in contexts that marks them as
> conditions.
> 
> One problem with many program languages is that the program does not
> identify the revision of the standard. 

What do you mean by that?

> This would be important with Javascript

There (still) is no "Javascript": <http://PointedEars.de/es-matrix>

[Granted, the feature list is not up-to-date anymore, and I am not sure if I
will manage to update it -- I have so much else to deal with right now; but
the basic argument that I presented there is still correct.]

> as the same program is intended for a large variety of
> implementations that are not updated to the latest revision or are
> aleady updated to a revision that is published after the publication
> of the program.
> 
> In Javascript there is the pragma "use strict".

In ECMAScript Ed. 5 and later, therefore in implementations of that.

> A similar pragma could be used to identify the revision expected to
> be supported.

I think that you have a major misconception about ECMAScript and the
landscape of ECMAScript implementations.

> In addition there should be a global constant or constants or function
> that tells the revision acutally supported so that program can adapt to
> what is available.

This is pointless because there is no implementtion that is fully compliant
with any Edition of ECMAScript, and there are so many features that it is
impossible to keep track of them.  It is better to test the features that
one actually uses.  And eventually one has to decide which syntactical
constructs one uses, considering that every syntactical construct sacrifices
a bit of backwards compatibility.

> The subject line means that Javascript already existed 30 years ago.

Not "Javascript", but (Netscape) JavaScript, literally.

> In some sense that is false: the Javascript that we know today is
> not the same as the Javascript 30 years ago.

You are the one who started with this false equivalence in the first place.

> But it is true as much of what Javascript was 30 years ago

30 years ago the nonsensical term "Javascript" that was introduced by people
who were either too lazy or too uninformed did not exist yet.

> is still present in the moders Javascript.

You do not know what you are talking about.  That probably comes from
reading books by people who also do not know what they are talking about but
present themselves as "gurus", like John Resig.

-- 
PointedEars

Twitter: @PointedEars2
Please do not cc me. / Bitte keine Kopien per E-Mail.

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30 Years Of JavaScript Lawrence D'Oliveiro <ldo@nz.invalid> - 2025-04-24 01:52 +0000
  Re: 30 Years Of JavaScript Mikko <mikko.levanto@iki.fi> - 2026-07-13 16:12 +0300
    Re: 30 Years Of JavaScript Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-07-13 22:31 +0000
      Re: 30 Years Of JavaScript Mikko <mikko.levanto@iki.fi> - 2026-07-14 09:59 +0300
        Re: 30 Years Of JavaScript Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-07-14 07:27 +0000
        Re: 30 Years Of JavaScript Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2026-07-18 04:51 +0200
    Re: 30 Years Of JavaScript John Harris <niam@jghnorth.org.uk.invalid> - 2026-07-14 10:50 +0100
      Re: 30 Years Of JavaScript Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-07-14 22:12 +0000
        Re: 30 Years Of JavaScript John Harris <niam@jghnorth.org.uk.invalid> - 2026-07-15 11:01 +0100
    Re: 30 Years Of JavaScript Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2026-07-18 04:46 +0200
      Re: 30 Years Of JavaScript Mikko <mikko.levanto@iki.fi> - 2026-07-19 11:40 +0300
        Re: 30 Years Of JavaScript Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-07-19 23:29 +0000
          Re: 30 Years Of JavaScript Mikko <mikko.levanto@iki.fi> - 2026-07-20 09:42 +0300
            Re: 30 Years Of JavaScript Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-07-20 08:08 +0000
              Re: 30 Years Of JavaScript Mikko <mikko.levanto@iki.fi> - 2026-07-21 08:57 +0300
                Re: 30 Years Of JavaScript Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-07-21 23:08 +0000
                Re: 30 Years Of JavaScript Mikko <mikko.levanto@iki.fi> - 2026-07-22 09:39 +0300
            Re: 30 Years Of JavaScript Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2026-07-27 14:20 +0200
        Re: 30 Years Of JavaScript Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2026-07-27 14:19 +0200
  Re: 30 Years Of JavaScript Jon Ribbens <jon+usenet@unequivocal.eu> - 2026-07-13 14:46 +0000

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