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Re: [css-display] Explaining <br>

From: Brad Kemper <brad.kemper@gmail.com>
Date: Fri, 25 Mar 2016 10:01:36 -0700
Cc: www-style list <www-style@w3.org>
Message-Id: <37299644-4ED4-422F-94D3-2AFC0731D1DB@gmail.com>
To: "Tab Atkins Jr." <jackalmage@gmail.com>


> On Mar 24, 2016, at 11:32 AM, Tab Atkins Jr. <jackalmage@gmail.com> wrote:
> 
> [abracadabra, this thread is NECRO'D!]
> 
>> On Thu, Jun 12, 2014 at 4:05 PM, Tab Atkins Jr. <jackalmage@gmail.com> wrote:
>> At the January f2f, we figured out a decent hack that seems to explain
>> the rendering of <br> properly:
>> 
>> br {
>>  display-box: contents;
>>  content: "\a";
>>  white-space: pre;
>> }
>> 
>> However, when Hixie was planning to add this to the HTML style sheet,
>> dbaron objected to it on performance reasons:
>> https://www.w3.org/Bugs/Public/show_bug.cgi?id=25503
>> 
>> So, David, how bad is this?  Should we go with a different solution,
>> like a dedicated 'display' value just for <br> (Hixie suggested
>> "display: newline;" in the linked bug).
> 
> The HTML spec has had `display: newline` in its CSS section for quite
> a while.  

Wouldn't it be better to just have the 'display-box: contents' version, but let the UA lie about it and optimize it into whatever it needs to, rather than create a whole new display value just for that? Or are we concerned that authors are going to use a duplicate of that UA style sheet rule for other things when they need a line break? They could still do so if they wanted, even if there was a 'newline' value too. 

> In addition, it's using `display: break-opportunity` to
> explain the magic of <wbr>.

What is the magic that can't be replicated with text properties? I'm not very familiar with this one. 

> 
> Unless the group decides that the above CSS is actually the best (and
> can come up with something equivalent for <wbr>), I plan to add
> "newline" and "break-opportunity" to the Display spec.  Any
> objections?
> 
> ~TJ
> 
Received on Friday, 25 March 2016 17:02:15 UTC

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