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Message-ID: <2810704.ZYsuzNNPX5@PointedEars.de>
From: Thomas 'PointedEars' Lahn <PointedEars@web.de>
Reply-To: Thomas 'PointedEars' Lahn <cljs@PointedEars.de>
Organization: PointedEars Software (PES)
Date: Sun, 29 Dec 2013 20:31:02 +0100
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Subject: Re: Insert Function into Error Object
Newsgroups: comp.lang.javascript
References: <e799$52bb95fb$adbbaaad$21889@ALLTEL.NET> <d539b$52befa47$adb8eda9$1902@ALLTEL.NET> <l9ps7t$doa$1@dont-email.me>
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Cezary Tomczyk wrote:

> 2013-12-28 17:20, MC wrote:
> [...]
>> So no one has any ideas on how to attach a function to be called when
>> the Error object is called?
> 
> Take a look at:
> http://stackoverflow.com/questions/783818/how-do-i-create-a-custom-error-in-javascript

The accepted answer is wrong as explained many times, not least in

<http://stackoverflow.com/a/12593269/855543>

The correct approach is

  NotImplementedError.prototype = (function () {
    function Foo () {}
    Foo.prototype = Error.prototype;
    return new Foo;
  }());

or simply

  NotImplementedError.prototype = Object.create(Error.prototype, {
    …
  });

See also JSX:object.js.

-- 
PointedEars

Twitter: @PointedEars2
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