> not evidence of real-world usage that would break popular websites
the Web is (still and thankfully) not about popular websites only.
Using the `Array.prototype` instead of creating instances in the wild has
been seen for long time, same way you don't do `{}.toString.call` but
`Object.prototype.toString.call` instead.
When a method like `concat` has no side effect to the prototype but can be
used as empty starting point for an Array creation, it's perfectly fine to
use it as such utility.
I am not sure that's the only exception though, and I don't have strong
opinion about this specific matter (there must be reasons to change and
software needs updates anyway) but I agree with Kyle that if ES6 claims
backward compatibility, it should stick with it.
This is a breaking change, small or big (famous/populare websites) is sort
of less relevant.
In github, as example, there's some usage already showing up:
https://github.com/search?utf8=%E2%9C%93&q=%22Array.prototype.concat%28%22&type=Code&ref=searchresults
I've also seen many `Array.prototype.concat.call([], ...)` which is
extremely pointless since that is the equivalent of `[].concat(...)` but
from time to time I use similar logic shown in Kyle example with reduce.
Again, I don't remember why these builtins needed such change, but things
like these should be probably announced as "potential breaking" so that
developers can be aware and eventually fix things here or there.
Regards
On Thu, Feb 19, 2015 at 4:38 PM, Domenic Denicola <[email protected]> wrote:
> From: es-discuss [mailto:[email protected]] On Behalf Of
> Allen Wirfs-Brock
>
> > This looks like the sort of evidence we asked for.
>
> I don't really think so. This is some tweets and books, not evidence of
> real-world usage that would break popular websites and cause browser game
> theory to kick in. Such evidence is best gathered by browser vendors making
> the change and seeing what it impacts. I believe IE12/Spartan might already
> be doing so---Brian, confirm/deny?
>
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