[whatwg] We should not throw DOM Consistency and Infoset compatibility under the bus

Simon Pieters simonp at opera.com
Wed Mar 6 09:48:35 PST 2013

On Mon, 14 Jan 2013 09:40:56 +0100, Henri Sivonen <hsivonen at iki.fi> wrote:

> Would it be terrible to make attempts to mutate the 'is' attribute
> throw thereby teaching authors who actually try to mutate it that it's
> not mutable?

We already have several attributes that are immutable but don't throw or  
anything when they're changed.

e.g. <script src>, <html manifest>.

In the case of manifest, we omitted the IDL attribute to signal that it  
shouldn't be changed.

As another example, <input type> was immutable in old IE and that made  
people think of it as immutable.

Simon Pieters
Opera Software

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