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Re: [whatwg] Opinions on window.console = "foo", and other oddities of window.console

From: Kenneth Russell <kbr@google.com>
Date: Mon, 8 Feb 2016 15:30:50 -0800
Message-ID: <CAMYvS2evDa2DZDZxfribBd=7=k65tvzQW0vptxqwdUCFw6er4g@mail.gmail.com>
To: Domenic Denicola <d@domenic.me>
Cc: "whatwg@whatwg.org" <whatwg@whatwg.org>, "terin@terinstock.com" <terin@terinstock.com>, Robert Kowalski <rok@kowalski.gd>, Travis Leithead <travis.leithead@microsoft.com>
The test harnesses used by the working group which I chair rely on being
able to replace window.console. I'd like to see it continue to be mutable.

On Mon, Feb 8, 2016 at 3:25 PM, Domenic Denicola <d@domenic.me> wrote:

> As you may know, we now have a standard for the console object:
> http://console.spec.whatwg.org/
> One of the first issues we encountered while investigating console
> behavior is https://github.com/whatwg/console/issues/1, which is that
> browsers currently allow setting `window.console` (and presumably
> `self.console` in workers) to any value. This is pretty weird, but every
> tested browser (Firefox, Chrome, Edge, and Safari) follows it.
> Probably the default course of action here is to just spec this. But we
> wanted to check to see if any implementers thought this was weird, and
> wanted to experiment with e.g. removing the setter.
> Even if we do go this route, we have another weirdness:
> - Firefox has an accessor descriptor (get/set), Chrome, Safari, and Edge
> have a data descriptor (value)
> - Firefox, Chrome, and Edge are enumerable; Safari is not enumerable
> I guess Chrome and Safari's data descriptors are not surprising, given
> that their bindings infrastructure for Window isn't fully Web
> IDL-compatible yet. But Edge is pretty surprising. Travis, do you have any
> info on that?
> So I think the plan of record is: `attribute any console`, with prose
> describing how the getter returns "the window's console object" which is
> initially set to a new instance of Console, but the setter can change it to
> any value. This means accessor descriptors and enumerable, since that's how
> IDL works. If anyone thinks this is bad, let us know. Otherwise the
> standard will be updated any day now in that direction.
Received on Monday, 8 February 2016 23:31:28 UTC

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