Approach of new Object methods in ES5
dhtmlkitchen at gmail.com
Sun Apr 18 13:57:07 PDT 2010
On Fri, Apr 16, 2010 at 9:51 AM, Erik Arvidsson
<erik.arvidsson at gmail.com> wrote:
> On Fri, Apr 16, 2010 at 08:43, Brendan Eich <brendan at mozilla.com> wrote:
>> ES4 since Waldemar's 1998-era JS2 work was concerned with the problem of
>> versioning APIs implied by (1) greatly, and not just adding properties:
>> deleting and redefining too. ES4 proposed namespaces (like Common Lisp
>> packages, IIRC) as the solution. But namespaces are out for Harmony.
>> My hope is that we can avoid versioning the object model and instead
>> simply extend certain objects that we effectively "reserve to the
>> implementation" (as ANSI and then ISO C does with certain global names, e.g.
>> __foo and _BAR). Indeed Ajax library developers now generally avoid
>> extending standard prototypes, and it's plausible this best-practice could
>> be extended to the built-in constructor objects too.
> These are considered best practices because it breaks in the presence of
> other code outside your control. There is a reason why Prototype.js is
> popular. It allows people to write code in a more sane way,
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