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[css3-flexbox] Best way to denote flexible lengths

From: Tab Atkins Jr. <jackalmage@gmail.com>
Date: Tue, 8 Mar 2011 14:33:16 -0800
Message-ID: <AANLkTi=z=Y=-ejV24TTKHyxEgYyJFA5RiTLd54E73ohq@mail.gmail.com>
To: www-style list <www-style@w3.org>
There was some disagreement during the FtF presentation on Flexbox
over how best to write flexible lengths.  In particular, the current
syntax very slightly favors "absolute" flexes over "additive" flexes.
The discussion didn't go too far in person, so I'm bringing it to the
list for more measured evaluation.

Here's a few options that were brought up:

(1)
Absolute flex can be specified by passing a single argument to the
flex() function, like flex(1). (The preferred width defaults to 0.)
Additive flex can be specified by passing three arguments to the
flex() function, like flex(1,0,200px).
The simplest additive flex (flexing from 'auto') can be specified by
just using 'auto'.

(2)
Additive flex can be specified by passing a single argument to the
flex() function, like flex(200px). (The positive flexibility defaults
to 1.)
Absolute flex can be specified by passing two arguments to the flex()
function, like flex(0,1).

(3)
Absolute flex can be specified by passing a single argument to the
flex() function, like flex(1).
Additive flex can be specified by passing a single argument to the
flex-size() function, like flex-size(200px). (The positive flexibility
defaults to 1.)

(4)
Absolute flex can be specified with the 'fl' unit, like 1fl.
Additive flex can be specified with the flex() function, like
flex(200px). (The positive flexibility defaults to 1.)

(5)
Absolute flex can be specified by passing an integer to the flex()
function, like flex(1).
Additive flex can be specified by passing a length to the flex()
function, like flex(200px).


I don't have strong opinions on which choice to make, but I slightly
lean toward (1) (it's what currently in the draft, after all).  What
do other people think?

~TJ
Received on Tuesday, 8 March 2011 22:34:19 GMT

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