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From: "Christoph M. Becker" <cmbecker69@arcor.de>
Newsgroups: comp.lang.javascript
Subject: Re: not "autovivification", but ...?
Date: Wed, 1 Jun 2016 18:46:48 +0200
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On 01.06.2016 at 16:51, Michael Haufe (TNO) wrote:

> On Tuesday, May 31, 2016 at 7:11:39 AM UTC-5, Christoph M. Becker wrote:
>
>> `this` is not special in this regard;  you can assign to undefined
>> properties of *any* object.
> 
> Most, not any. For example: [1]
> 
>> Also consider that accessing undefined properties of an object yield
>> `undefined` (but not an error), so it appears to be logical to allow
>> assigning another value to such undefined properties.
> 
> That does not follow. Ex:
> 
> //assume this function is defined in a 3rd party library
> function getSomeObject(){
>   return Object.seal({
>     hello: "world"
>   })
> }
>
> [1] <https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/seal>

Thanks for pointing that out.  I most certainly should catch up with ES
5.1 ASAP. :)

-- 
Christoph M. Becker