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[ANN] ECMAScript Support Matrix 2

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  [ANN] ECMAScript Support Matrix 2 Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2013-06-11 19:14 +0200
    Re: ECMAScript Support Matrix 2 "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2013-06-16 21:41 -0700
      Re: ECMAScript Support Matrix 2 "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2013-06-16 22:01 -0700
      Re: ECMAScript Support Matrix 2 Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2013-06-17 09:15 +0200
        Re: ECMAScript Support Matrix 2 Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2013-06-17 14:50 +0200
    Re: ECMAScript Support Matrix 2 "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2013-06-16 21:49 -0700
    Re: [ANN] ECMAScript Support Matrix 2 "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2013-06-18 20:02 -0700
      Re: [ANN] ECMAScript Support Matrix 2 Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2013-06-19 13:56 +0200

#20209 — [ANN] ECMAScript Support Matrix 2

Hello all,

I would like to announce the release of a new version of the
ECMAScript Support Matrix (ES-Matrix), available at 

  <http://PointedEars.de/es-matrix>

The ES-Matrix is an ongoing community-supported effort to document and 
compare the features of widely distributed ECMAScript implementations, 
currently:

  * Netscape/Mozilla JavaScript (since 1995/1996 CE)
  * Microsoft JScript           (since 1996)
  * Opera ECMAScript            (since 1997)
  * KDE JavaScript              (since 2000)
  * Apple/WebKit JavaScriptCore (since 2003/2005)
  * Google V8 JavaScript        (since 2008)

It enables developers of ECMAScript-based applications to improve the 
compatibility, robustness, and efficiency of their code by adding feature 
tests and fallbacks where they are considered necessary, and (re)moving
them where they are no longer (always) considered necessary.

Important changes to the previous version (baseline 2011-08-21, r54) are:

  * Based on a novel, scientific approach: [1]
    - Tests of more features of ECMAScript 3, 5 and beyond
      (targeting full coverage)
    - More thorough tests for availability and functionality of features
      based on Specification algorithms (ES 5.1, usually non-strict mode)
    - Easy maintenance of features and testcases
    - Possibility for immediate feedback of test results (submit button)
    - Persistent storage of test results
    - Automatic invalidation of test results if testcases are modified
    - Detailed results for versions of implementations and testcases
    - Semi-automatic linking of environments to versions of   
      implementations
    - Semi-automatic determination of safe features
    - General applicability of the testing framework to similar areas
      (like the DOM)

  * Input control to filter features table by text or regular expression
  * Improved readability by displaying feature details only on demand
    (hovering of mouse pointer; to be completed)
  * Detailed SVG timeline (tabular timeline removed for the time being)
  * Updated version information and detection
  * Uses HTML5 for semantic markup and microdata
  * Lots of bugfixes

See the changelog, which is linked to on top of the Matrix, for details.

Constructive feedback is welcome.

________
[1] Lahn, Thomas (2012). “Features von ECMAScript-basierten
    Programmiersprachen – Eine vergleichende Analyse” (“Features of
    ECMAScript-based programming languages. A comparative analysis.”
    BSc SUPSI in Computer Science. Fernfachhochschule Schweiz (Swiss
    Distance-Learning University of Applied Sciences).  (translation
    into English in progress)
-- 
PointedEars

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

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#20315 — Re: ECMAScript Support Matrix 2

On Jun 11, 12:14 pm, Thomas 'PointedEars' Lahn <PointedE...@web.de>
wrote:
> Hello all,
>
> I would like to announce the release of a new version of the
> ECMAScript Support Matrix (ES-Matrix), available at
>
>   <http://PointedEars.de/es-matrix>
>
> The ES-Matrix is an ongoing community-supported effort to document and
> compare the features of widely distributed ECMAScript implementations,
> currently:
>
>   * Netscape/Mozilla JavaScript (since 1995/1996 CE)
>   * Microsoft JScript           (since 1996)
>   * Opera ECMAScript            (since 1997)
>   * KDE JavaScript              (since 2000)
>   * Apple/WebKit JavaScriptCore (since 2003/2005)
>   * Google V8 JavaScript        (since 2008)
>
> It enables developers of ECMAScript-based applications to improve the
> compatibility, robustness, and efficiency of their code by adding feature
> tests and fallbacks where they are considered necessary, and (re)moving
> them where they are no longer (always) considered necessary.
>
> Important changes to the previous version (baseline 2011-08-21, r54) are:
>
>   * Based on a novel, scientific approach: [1]
>     - Tests of more features of ECMAScript 3, 5 and beyond
>       (targeting full coverage)
>     - More thorough tests for availability and functionality of features
>       based on Specification algorithms (ES 5.1, usually non-strict mode)
>     - Easy maintenance of features and testcases
>     - Possibility for immediate feedback of test results (submit button)
>     - Persistent storage of test results
>     - Automatic invalidation of test results if testcases are modified
>     - Detailed results for versions of implementations and testcases
>     - Semi-automatic linking of environments to versions of
>       implementations
>     - Semi-automatic determination of safe features
>     - General applicability of the testing framework to similar areas
>       (like the DOM)
>
>   * Input control to filter features table by text or regular expression
>   * Improved readability by displaying feature details only on demand
>     (hovering of mouse pointer; to be completed)
>   * Detailed SVG timeline (tabular timeline removed for the time being)
>   * Updated version information and detection
>   * Uses HTML5 for semantic markup and microdata
>   * Lots of bugfixes
>
> See the changelog, which is linked to on top of the Matrix, for details.
>
> Constructive feedback is welcome.


Disclaimer: The website is down at the moment, and I am responding
from memory of what I saw last Friday.

I'm glad to see this has been updated, but I would like to see a
better display of the test code though. For the larger ones, the
tooltip is insufficient in size and cuts off the code.

I believe there are Mozilla JavaScript features missing from the table
still:

Object.__count__
Object.__parent__
Object.eval()
Sharp variables:
    var a = #1 = { val:1, next:{val:2, next:#1#} };

Mind providing a link to your paper? I believe I am competent enough
in German to stumble through it.

Once the website comes back online, I'll take a longer look

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#20317 — Re: ECMAScript Support Matrix 2

On Jun 16, 11:41 pm, "Michael Haufe (TNO)" <t...@thenewobjective.com>
wrote:
[...]
> Sharp variables:
>     var a = #1 = { val:1, next:{val:2, next:#1#} };
[...]

This feature was removed in JavaScript 1.8.5 according to MDN, but I
can't find anything specific for when it was introduced. The closest I
can find is from a short exchange I had with Brenden:
<https://mail.mozilla.org/pipermail/es-discuss/2011-May/014744.html>

So it is pre-ES3 it seems.

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#20319 — Re: ECMAScript Support Matrix 2

Michael Haufe (TNO) wrote:

> Thomas 'PointedEars' Lahn wrote:
>> I would like to announce the release of a new version of the
>> ECMAScript Support Matrix (ES-Matrix), available at
>>
>> <http://PointedEars.de/es-matrix>
>>
>> […] 
> 
> Disclaimer: The website is down at the moment,

Yes, unfortunately there appears to be a Web server problem.  I am looking 
into it.

> and I am responding from memory of what I saw last Friday.
> 
> I'm glad to see this has been updated, but I would like to see a
> better display of the test code though. For the larger ones, the
> tooltip is insufficient in size and cuts off the code.

Yes, I am aware of that.

> I believe there are Mozilla JavaScript features missing from the table
> still:
> 
> Object.__count__
> Object.__parent__
> Object.eval()
> Sharp variables:
>     var a = #1 = { val:1, next:{val:2, next:#1#} };

ACK.

> Mind providing a link to your paper? I believe I am competent enough
> in German to stumble through it.

It was linked to in the footnote as
<http://PointedEars.de/scripts/test/es-matrix/application/doc/thesis.pdf>.  
The URI is temporary as a translation into English and the production of 
HTML versions are in progress.

> Once the website comes back online, I'll take a longer look

Thanks.

-- 
PointedEars

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

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#20324 — Re: ECMAScript Support Matrix 2

Thomas 'PointedEars' Lahn wrote:

> Michael Haufe (TNO) wrote:
>> Thomas 'PointedEars' Lahn wrote:
>>> I would like to announce the release of a new version of the
>>> ECMAScript Support Matrix (ES-Matrix), available at
>>>
>>> <http://PointedEars.de/es-matrix>
>>>
>>> […]
>> 
>> Disclaimer: The website is down at the moment,
> 
> Yes, unfortunately there appears to be a Web server problem.  I am looking
> into it.

It is online again.  We are investigating the reason why only Apache was 
killed.  No conclusions as of yet.  There is nothing suspicious in the logs.  
We know that there was no problem with disk space or memory, which had been 
the reasons for server outages before, and the distribution still is Debian 
GNU/Linux *Stable*.

-- 
PointedEars

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

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#20316 — Re: ECMAScript Support Matrix 2

On Jun 11, 12:14 pm, Thomas 'PointedEars' Lahn <PointedE...@web.de>
wrote:
> Hello all,
>
> I would like to announce the release of a new version of the
> ECMAScript Support Matrix (ES-Matrix), available at
>
>   <http://PointedEars.de/es-matrix>
>
> The ES-Matrix is an ongoing community-supported effort to document and
> compare the features of widely distributed ECMAScript implementations,
> currently:
>
>   * Netscape/Mozilla JavaScript (since 1995/1996 CE)
>   * Microsoft JScript           (since 1996)
>   * Opera ECMAScript            (since 1997)
>   * KDE JavaScript              (since 2000)
>   * Apple/WebKit JavaScriptCore (since 2003/2005)
>   * Google V8 JavaScript        (since 2008)
>
> It enables developers of ECMAScript-based applications to improve the
> compatibility, robustness, and efficiency of their code by adding feature
> tests and fallbacks where they are considered necessary, and (re)moving
> them where they are no longer (always) considered necessary.
>
> Important changes to the previous version (baseline 2011-08-21, r54) are:
>
>   * Based on a novel, scientific approach: [1]
>     - Tests of more features of ECMAScript 3, 5 and beyond
>       (targeting full coverage)
>     - More thorough tests for availability and functionality of features
>       based on Specification algorithms (ES 5.1, usually non-strict mode)
>     - Easy maintenance of features and testcases
>     - Possibility for immediate feedback of test results (submit button)
>     - Persistent storage of test results
>     - Automatic invalidation of test results if testcases are modified
>     - Detailed results for versions of implementations and testcases
>     - Semi-automatic linking of environments to versions of
>       implementations
>     - Semi-automatic determination of safe features
>     - General applicability of the testing framework to similar areas
>       (like the DOM)
>
>   * Input control to filter features table by text or regular expression
>   * Improved readability by displaying feature details only on demand
>     (hovering of mouse pointer; to be completed)
>   * Detailed SVG timeline (tabular timeline removed for the time being)
>   * Updated version information and detection
>   * Uses HTML5 for semantic markup and microdata
>   * Lots of bugfixes
>
> See the changelog, which is linked to on top of the Matrix, for details.
>
> Constructive feedback is welcome.

I don't recall the following existing in the table either. In legacy
Mozilla JavaScript:

arguments[-3] === arguments.callee
arguments[-2] === arguments.length

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#20342

On Tuesday, June 11, 2013 12:14:04 PM UTC-5, Thomas 'PointedEars' Lahn wrote:
> Hello all,
> 
> 
> 
> I would like to announce the release of a new version of the
> 
> ECMAScript Support Matrix (ES-Matrix), available at 
> 
> 
> 
>   <http://PointedEars.de/es-matrix>
> 
> 
> 
> The ES-Matrix is an ongoing community-supported effort to document and 
> 
> compare the features of widely distributed ECMAScript implementations, 
> 
> currently:
> 
> 
> 
>   * Netscape/Mozilla JavaScript (since 1995/1996 CE)
> 
>   * Microsoft JScript           (since 1996)
> 
>   * Opera ECMAScript            (since 1997)
> 
>   * KDE JavaScript              (since 2000)
> 
>   * Apple/WebKit JavaScriptCore (since 2003/2005)
> 
>   * Google V8 JavaScript        (since 2008)
> 
> 
> 
> It enables developers of ECMAScript-based applications to improve the 
> 
> compatibility, robustness, and efficiency of their code by adding feature 
> 
> tests and fallbacks where they are considered necessary, and (re)moving
> 
> them where they are no longer (always) considered necessary.
> 
> 
> 
> Important changes to the previous version (baseline 2011-08-21, r54) are:
> 
> 
> 
>   * Based on a novel, scientific approach: [1]
> 
>     - Tests of more features of ECMAScript 3, 5 and beyond
> 
>       (targeting full coverage)
> 
>     - More thorough tests for availability and functionality of features
> 
>       based on Specification algorithms (ES 5.1, usually non-strict mode)
> 
>     - Easy maintenance of features and testcases
> 
>     - Possibility for immediate feedback of test results (submit button)
> 
>     - Persistent storage of test results
> 
>     - Automatic invalidation of test results if testcases are modified
> 
>     - Detailed results for versions of implementations and testcases
> 
>     - Semi-automatic linking of environments to versions of   
> 
>       implementations
> 
>     - Semi-automatic determination of safe features
> 
>     - General applicability of the testing framework to similar areas
> 
>       (like the DOM)
> 
> 
> 
>   * Input control to filter features table by text or regular expression
> 
>   * Improved readability by displaying feature details only on demand
> 
>     (hovering of mouse pointer; to be completed)
> 
>   * Detailed SVG timeline (tabular timeline removed for the time being)
> 
>   * Updated version information and detection
> 
>   * Uses HTML5 for semantic markup and microdata
> 
>   * Lots of bugfixes
> 
> 
> 
> See the changelog, which is linked to on top of the Matrix, for details.
> 
> 
> 
> Constructive feedback is welcome.
> 
> 
> 
> ________
> 
> [1] Lahn, Thomas (2012). “Features von ECMAScript-basierten
> 
>     Programmiersprachen – Eine vergleichende Analyse” (“Features of
> 
>     ECMAScript-based programming languages. A comparative analysis.”
> 
>     BSc SUPSI in Computer Science. Fernfachhochschule Schweiz (Swiss
> 
>     Distance-Learning University of Applied Sciences).  (translation
> 
>     into English in progress)

From today:

https://twitter.com/evilpies/status/347097132660039680

"SpiderMonkey now uses Firefox versions. We release SM standalone with every Firefox ESR. There are no more JavaScript versions"

I assume the matrix will begin to track browser versions now

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#20344

Michael Haufe (TNO) wrote:

>> [full quote]

Please don't.
 
> From today:
> 
> https://twitter.com/evilpies/status/347097132660039680
> 
> "SpiderMonkey now uses Firefox versions. We release SM standalone with
> every Firefox ESR. There are no more JavaScript versions"

I gathered as much from scanning the latest SpiderMonkey source this 
morning, trying to find out how to properly label the JavaScript versions 
from Firefox 6 on (there were no “New in JavaScript x.y.z” articles in MDN 
anymore, only “Firefox v for developers” articles with “JavaScript” 
sections).
 
<http://hg.mozilla.org/mozilla-central/file/d2a7cfa34154/js/src/configure.in#l230>

> I assume the matrix will begin to track browser versions now

It already did (from Matrix v2 on) for JavaScript versions after 1.8.6 
(Firefox 5.0.x).  Should it turn out that the SpiderMonkey version 
corresponds with the Mozilla version now, so be it.  That does not mean that 
the Matrix will be switched to browser versions.  SpiderMonkey and other 
ECMAScript implementations still can be used outside of browsers.

Another change will be to track JScript and JScript .NET versions in 
separate rows at least, as now there are both JScript 10.x and JScript .NET 
10.x (previously, JScript versions were 5.x and 9.x, while JScript .NET 
versions were 7.x, 8.x and 10.x).

-- 
PointedEars

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

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