Re: [css-flexbox] Renaming flex-basis:auto for less confusion

On 11/05/2014 12:06 AM, Bruno Racineux wrote:
> On 11/3/14 1:45 PM, "Daniel Holbert" <dholbert@mozilla.com> wrote:
>> The "main-size" rename has only made it as far as Firefox's "beta"
>> release -- it hasn't made it to an official release yet. It's possible
>> we'd discover more breakage on the release channel.
> 
> Why do implementors have to break the previous behavior in the first place?
> 
> Can't browsers implement the new keyword and keep the old 'auto' keyword
> for a while, for backward compatibility reasons, and just issue warnings
> in the console to avoid said breakage if proven a significant problem?

Nope -- not with the "flex-basis:main-size" proposal, at least (the spec
text in the current ED).

Part of the point of that proposal is to *change* the meaning of
"flex-basis:auto", (to make it mean the same thing as "width:auto" or
"height:auto").  So, it's not possible to both implement that new
behavior & simultaneously keep the old "auto" keyword behavior as you
suggest.