Re: LESS/ SASS/... style usage in GWT ?

2015-04-24 Thread Jens


 With HexaCss http://lteconsulting.fr/hexacss/ for GWT, you can use 
 Sass, Less, Susy, Foundation, Bootstrap and so on. For the programmer you 
 use it the same kind of way as CssResource/ClientBundle, but then you bind 
 your application to external CSS files, and thus can use any CSS Framework. 
 You should have a try !

 This is what i use to quickly wrap an existing CSS Framework (bootstrap, 
 skeleton, ...) or to use my own Less or Sass or GSS stylesheet



That might be a dumb question but:

If I don't need theme switcher support then HexaCss doesn't really add any 
value or does it? I mean I can just generate/use a css file from any css 
framework / css preprocessor and then create a matching CssResource for its 
content. Then GWT will do the rest.

So it seems to me that HexaCss is just about dynamic themes while still 
having some css pruning and minification?


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Re: LESS/ SASS/... style usage in GWT ?

2015-04-24 Thread Arnaud TOURNIER
Hi Jens,

True that HexaCss allows for theme switching, but it is only a side effect
of what it really allows : to have multiple css files bound to the same gwt
application, without needing to recompile the application.

For example, you might want to rebrand your application for another
customer, you might want to generate css on the fly according to some user
preference, and so on.

There are other advantages. For instance, i saw many of my customer's
projects were each widget has one CssResource interface associated and one
corresponding css file. This leads to a lot of little css files scattered
accross the project. With HexaCss, you can still have one java interface by
widget, which is cool from the point of view of object oriented
programming. And then you can make up bigger css files having each one
cover several java interfaces. For example one CSS file for each of the
three main packages of your application...

Also, what you can do : for instance imagine you are using an external GWT
library. If this library uses CssResource, you will have hard time
customizing its css. But if it uses HexaCss, you just have to provide a CSS
file, run the maven plugin on it and you are done ! No need to make some
CssResource inheritance mechanism to insert your own CSS. You don't have to
entangle too much the CSS concepts and the Java architecture concepts.

There may be many more use cases, i found myself discovering new ones
often. The first one was not having to recompile the application when
chaning the css files.

In one word, what this tool does is to decorrelate the CSS use from the
Java GWT compilation.

- The first phase of the tool does an analysis of your Java HexaCss
interfaces to generate a consistent naming accross compilations.
- Then the maven plugin uses the information produced during the GWT
compilation to transform your css files (generated with less, sass, gss or
not) so that they are optimized and bound correctly to your application.

I am not sure i am really clear in my explanation, but i hope you get the
idea... So the theme switcher is for me really just a way to show that the
GWT compilation is decorrelated from the CSS binding, which is the essence
of this tool.

Thanks !

Arnaud

Le ven. 24 avr. 2015 à 20:08, Jens jens.nehlme...@gmail.com a écrit :


 With HexaCss http://lteconsulting.fr/hexacss/ for GWT, you can use
 Sass, Less, Susy, Foundation, Bootstrap and so on. For the programmer you
 use it the same kind of way as CssResource/ClientBundle, but then you bind
 your application to external CSS files, and thus can use any CSS Framework.
 You should have a try !

 This is what i use to quickly wrap an existing CSS Framework (bootstrap,
 skeleton, ...) or to use my own Less or Sass or GSS stylesheet



 That might be a dumb question but:

 If I don't need theme switcher support then HexaCss doesn't really add any
 value or does it? I mean I can just generate/use a css file from any css
 framework / css preprocessor and then create a matching CssResource for its
 content. Then GWT will do the rest.

 So it seems to me that HexaCss is just about dynamic themes while still
 having some css pruning and minification?


 -- J.

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Re: LESS/ SASS/... style usage in GWT ?

2015-04-24 Thread mmcrober
Does that include the ability to modify styles without redeploying the WAR 
file?

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Re: LESS/ SASS/... style usage in GWT ?

2015-04-24 Thread Ed Bras
​There are several options to fly to the moon.
There is no silver bullet. .. Just pick the best of all worlds for your
situation...
If your Css needs to be very flexible, I don't think that CssResource is
the correct choice...
I would then use Errai with a good html parser, that is able to create
behavior from the html attributes (like frameworks like
bootstrap/foundation do). Example: in my html, through data-* attribute I
define behavior like the carousel delay, or the internal navigation to
other parts of the app. Works very well, no need to change gwt code through
these kind of syntax

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Re: LESS/ SASS/... style usage in GWT ?

2015-04-24 Thread Arnaud TOURNIER
Not exactly because the css files are typically served from the war file.
You could of course host them on a CDN so that you don't have to redeploy
your war (but then you need an internet connection and your application
will depend on it to have the CSS, which i find OK only if your application
is hosted on the public web).

What is sure is that you don't have to RECOMPILE your GWT application to
change the styles...

I am not sure to have well understood your question, maybe you can give
more context on what you want to do when you mean changing the styles
without modifying the war...

Thanks

Arnaud

Le ven. 24 avr. 2015 à 19:46, mmcro...@harris.com a écrit :

 Does that include the ability to modify styles without redeploying the WAR
 file?

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Re: LESS/ SASS/... style usage in GWT ?

2015-04-24 Thread Jens


 I am not sure i am really clear in my explanation, but i hope you get the 
 idea... 


Yeah I got the idea. Although I don't need it now it seems quite handy for 
theming and I like the fact that the external CSS file can still be pruned 
with the help of the generated mapping file.

I think what confused me is the fact that it heavily emphasizes that it 
enables you to use any css framework / preprocessor with GWT. However you 
can just do that without your library as well because GWT does not care how 
the css/gss file for a CssResource is generated. You can very well use scss 
files, turn them into css files and then compile the GWT app.

So IMHO the main advantage of your library really is easy theming without 
recompiling the GWT app while still having optimized/pruned/minified 
external css files. That you can use LESS, SASS and the like is logical as 
your library, as well as GWT itself, does not care how the input CSS file 
has been generated. Maybe you should rework your documentation and homepage 
a bit because while reading it I always thought well thats just the same 
as css resource and totally missed that you optimize/prune external css 
files against an already compile GWT app.

-- J.

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Re: LESS/ SASS/... style usage in GWT ?

2015-04-24 Thread Jens
I would probably just serve the CSS using a servlet that fetches the CSS 
from database based on the current customer. The app would then have a 
small UI to update the CSS in the database.

If you don't need to give customers full control but just want to allow 
them to change logo / colors then I think you can also use CssResource 
runtime evaluation. That is you would define

@def APP_BACKGROUND_COLOR 
eval(com.example.app.client.resource.Branding.getBackgroundColor());

and then use APP_BACKGROUND_COLOR throughout your CssResource styles. To 
make Branding.getBackgroundColor() return the correct value for a given 
customer you would load that information from your server and set it on the 
Branding class before you inject the CSS. In your app UI you would then 
have a simple text box where customer can change the CSS hex color.

-- J.

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Re: LESS/ SASS/... style usage in GWT ?

2015-04-24 Thread mmcrober
Well, the idea is that you have a product used by multiple customers that's 
deployed as a WAR file, but the customers want to be able to do their own 
customizations on the style for branding, style consistency, etc.  They may 
not have Java developers or Java developer tools, but understand 
stylesheets.  Also, if the customers muck around inside the WAR file, it 
will no longer match the released version complicating product support and 
upgrades.  Not to say that changes styles doesn't have some consequences 
but change management of multiple style baselines a lot better than 
multiple code baselines.

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Re: LESS/ SASS/... style usage in GWT ?

2015-04-24 Thread Ed Bras
Have a look at the RedHat Errai templating mechanism.
Errai is setup in modules (jar's), so you can use only the parts you need.
And easy to extend/fork parts you need.

The idea is that you load the css/html dynamically when needed in the app
(through annotations). These html/css snippets/pages can be
controlled/provided by Customers/third party companies. It works well,
efficient with a good productivity: you can easily change the css/html
without recompiling the GWT app. It works good when clients want other
colors or provider their own html snippets/pages..
GWT loads the css/html snippets and adds logic to the required html
snippets, like buttons and form processing, etc...

With all the css/html framework and developers out there these days, it a
very friendly and productive integration.
As a GWT developer I love it and makes me happy. I don't want to be busy
with missing pixels and jumping css behaviors. Everybody has to do what he
is good at ;) Especially these days, css/js is changing a lot, difficult to
keep up with...

Just my 50 cent...


​

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Re: LESS/ SASS/... style usage in GWT ?

2015-04-24 Thread Arnaud TOURNIER
Thanks Jens for your advice,

i will definitely change the text on the website in the way you said it.
Obvisouly i lack skills in communicating !

Thanks again !

Arnaud

Le ven. 24 avr. 2015 à 21:46, Jens jens.nehlme...@gmail.com a écrit :


 I am not sure i am really clear in my explanation, but i hope you get the
 idea...


 Yeah I got the idea. Although I don't need it now it seems quite handy for
 theming and I like the fact that the external CSS file can still be pruned
 with the help of the generated mapping file.

 I think what confused me is the fact that it heavily emphasizes that it
 enables you to use any css framework / preprocessor with GWT. However you
 can just do that without your library as well because GWT does not care how
 the css/gss file for a CssResource is generated. You can very well use scss
 files, turn them into css files and then compile the GWT app.

 So IMHO the main advantage of your library really is easy theming without
 recompiling the GWT app while still having optimized/pruned/minified
 external css files. That you can use LESS, SASS and the like is logical as
 your library, as well as GWT itself, does not care how the input CSS file
 has been generated. Maybe you should rework your documentation and homepage
 a bit because while reading it I always thought well thats just the same
 as css resource and totally missed that you optimize/prune external css
 files against an already compile GWT app.

 -- J.

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Re: LESS/ SASS/... style usage in GWT ?

2015-04-24 Thread Arnaud TOURNIER
Thanks Ed, i will have a look at Errai again, last time i did i focused on
other parts and missed the theming parts...
Arnaud

Le ven. 24 avr. 2015 à 21:53, Ed Bras post2edb...@gmail.com a écrit :

 Have a look at the RedHat Errai templating mechanism.
 Errai is setup in modules (jar's), so you can use only the parts you need.
 And easy to extend/fork parts you need.

 The idea is that you load the css/html dynamically when needed in the app
 (through annotations). These html/css snippets/pages can be
 controlled/provided by Customers/third party companies. It works well,
 efficient with a good productivity: you can easily change the css/html
 without recompiling the GWT app. It works good when clients want other
 colors or provider their own html snippets/pages..
 GWT loads the css/html snippets and adds logic to the required html
 snippets, like buttons and form processing, etc...

 With all the css/html framework and developers out there these days, it a
 very friendly and productive integration.
 As a GWT developer I love it and makes me happy. I don't want to be busy
 with missing pixels and jumping css behaviors. Everybody has to do what he
 is good at ;) Especially these days, css/js is changing a lot, difficult to
 keep up with...

 Just my 50 cent...


 ​

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Re: LESS/ SASS/... style usage in GWT ?

2015-04-24 Thread Ed Bras
Concerning the Theming part: I did a gwt project like @Jens explained and
works well.

Details: like @Jens mention, retrieve values (often: colors, logos, etc..
and not layout like height/width) from static java files. The static java
(preference bridge) class will then forward the call to a contained java
(preference) class that it loads through GWT, as such that in GWT config
you specify the file that it need to load - Theming ;)... Works well,
another GWT config file results in another (client) theme.

Below Some copy/paste code to make it more clear (the Css part is like Jens
mentioned above). It concern a Standard theme that has a corresponding
Standard.gwt.xml file. So every client/theme would have it's own gwt xml
file. The Theme file you include in your app and compile it... So in Maven
you can define different gwt compiler jobs for every Theme...
Works well for white label kind of web apps..

The bridge class (I think I posted it before in the GWT forum some years
ago):

public final class ActivateCodePreferencesBridge implements
ResourcesPreferencesBridge {

private static final ActivateCodePreferences BRIDGE =
GWT.create(ActivateCodePreferences.class);

private ActivateCodePreferencesBridge() {
}

private static ActivateCodePreferences getBridge() {
return BRIDGE;
}

public static String activateFontColor() {
return getBridge().activateFontColor();
}

public static String activateFontWeight() {
return getBridge().activateFontWeight();
}

public static String activateFontSize() {
return getBridge().activateFontSize();
}
}



An implementation of the Preference instance:
--
public final class StandardActivationCodePreferences extends
AppStandardPreferencesBase implements ActivateCodePreferences {

public String activateFontColor() {
return color006699();
}

public String activateFontWeight() {
return fontWeightBold();
}

public String activateFontSize() {
return fontSize14();
}
}

--

And the GWT config Standard.gwt.xml:

module
   replace-with class=com.bla.standard.StandardActivateCodePreferences
  when-type-is class=com.bla.ActivateCodePreferences /
   /replace-with
/module


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Re: LESS/ SASS/... style usage in GWT ?

2015-04-24 Thread Arnaud TOURNIER
Cool, but sometimes CSS is not about just colors !

You may want to change the structure of the CSS between themes. For example
one theme would have the checkboxes styled so they look as iOS ones
(through some known CSS tricks with ::content and so on) and other times
you might want them to appear in another way.

So it's not just a matter of injecting a color value... It's matter of
completely changing the CSS structure.

In that case, how would you do with CssResources ?

Thanks, i like this discussion !

Arnaud

Le ven. 24 avr. 2015 à 22:17, Jens jens.nehlme...@gmail.com a écrit :

 I would probably just serve the CSS using a servlet that fetches the CSS
 from database based on the current customer. The app would then have a
 small UI to update the CSS in the database.

 If you don't need to give customers full control but just want to allow
 them to change logo / colors then I think you can also use CssResource
 runtime evaluation. That is you would define

 @def APP_BACKGROUND_COLOR
 eval(com.example.app.client.resource.Branding.getBackgroundColor());

 and then use APP_BACKGROUND_COLOR throughout your CssResource styles. To
 make Branding.getBackgroundColor() return the correct value for a given
 customer you would load that information from your server and set it on the
 Branding class before you inject the CSS. In your app UI you would then
 have a simple text box where customer can change the CSS hex color.


 -- J.

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Re: LESS/ SASS/... style usage in GWT ?

2015-04-20 Thread Ltearno
With HexaCss http://lteconsulting.fr/hexacss/ for GWT, you can use Sass, 
Less, Susy, Foundation, Bootstrap and so on. For the programmer you use it 
the same kind of way as CssResource/ClientBundle, but then you bind your 
application to external CSS files, and thus can use any CSS Framework. You 
should have a try !

This is what i use to quickly wrap an existing CSS Framework (bootstrap, 
skeleton, ...) or to use my own Less or Sass or GSS stylesheet.

Thanks

Arnaud Tournier
twitter : @ltearno

Le vendredi 14 juin 2013 15:23:43 UTC+2, Ed a écrit :

 Hi,
 I am curious how people use LESS/SASS/... etc.. in GWT i.c.m. GWT 
 Clientbundle mechanism?
 I looking into using this (never did before).
 Please share your experience? (setup, css parsing, experience, )



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Re: LESS/ SASS/... style usage in GWT ?

2013-06-20 Thread Daniel Kurka
So we need a better way of doing CSS in GWT, this is what the complete 
collection of issues stands for.
We are talking about how to add this to GWT in a proper way and I am very 
much interested in this. For example the mgwt css looks very messy and it 
could very much benefit from something like GSS.

- Daniel

On Friday, June 14, 2013 4:29:34 PM UTC+2, RyanZA wrote:

 It's been (erroneously) merged into issue 8162, which is just a generic 
 CSS3 issue. So I wouldn't get your hopes up too quickly.


 https://code.google.com/p/google-web-toolkit/issues/detail?can=2q=8162colspec=ID%20Type%20Status%20Owner%20Milestone%20Summary%20Starsid=8162




 On Fri, Jun 14, 2013 at 4:22 PM, Ed Bras post2...@gmail.com javascript:
  wrote:

 I think the gwt dev team is thinking about CSS SASS support, from the 
 looks of issue 7624:
 https://code.google.com/p/google-web-toolkit/issues/detail?id=7624
 It hasn't become stale yet ... ;)


 On Fri, Jun 14, 2013 at 4:19 PM, Ed post2...@gmail.com javascript:wrote:

 Vaadin has a special linker that should let you use SASS. I haven't 
 tried it though.

 https://vaadin.com/blog/-/**blogs/link-to-the-client-side-**from-sasshttps://vaadin.com/blog/-/blogs/link-to-the-client-side-from-sass

 Thanks for reminding, I almost forgot it :(.
 I am currious when this will also be available in the core gwt? As 
 Vaadin is now now an  GWT contributor, what are the plans for these things ?

 Could it be possible to just pick up this piece of functionality of 
 Vaadin and use it, and how ? (without using anything else of Vaadin).

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Re: LESS/ SASS/... style usage in GWT ?

2013-06-20 Thread Juan Pablo Gardella
I do agree, CSS in GWT are complex. This is a good improvement Simplifies
the use of CSS in GWT.


2013/6/20 Daniel Kurka danku...@google.com

 So we need a better way of doing CSS in GWT, this is what the complete
 collection of issues stands for.
 We are talking about how to add this to GWT in a proper way and I am very
 much interested in this. For example the mgwt css looks very messy and it
 could very much benefit from something like GSS.

 - Daniel


 On Friday, June 14, 2013 4:29:34 PM UTC+2, RyanZA wrote:

 It's been (erroneously) merged into issue 8162, which is just a generic
 CSS3 issue. So I wouldn't get your hopes up too quickly.

 https://code.google.com/p/**google-web-toolkit/issues/**
 detail?can=2q=8162colspec=**ID%20Type%20Status%20Owner%**
 20Milestone%20Summary%20Stars**id=8162https://code.google.com/p/google-web-toolkit/issues/detail?can=2q=8162colspec=ID%20Type%20Status%20Owner%20Milestone%20Summary%20Starsid=8162




 On Fri, Jun 14, 2013 at 4:22 PM, Ed Bras post2...@gmail.com wrote:

 I think the gwt dev team is thinking about CSS SASS support, from the
 looks of issue 7624:
 https://code.google.com/p/**google-web-toolkit/issues/**detail?id=7624https://code.google.com/p/google-web-toolkit/issues/detail?id=7624
 It hasn't become stale yet ... ;)


 On Fri, Jun 14, 2013 at 4:19 PM, Ed post2...@gmail.com wrote:

 Vaadin has a special linker that should let you use SASS. I haven't
 tried it though.

 https://vaadin.com/blog/-/**blog**s/link-to-the-client-side-**from**
 -sasshttps://vaadin.com/blog/-/blogs/link-to-the-client-side-from-sass

 Thanks for reminding, I almost forgot it :(.
 I am currious when this will also be available in the core gwt? As
 Vaadin is now now an  GWT contributor, what are the plans for these things 
 ?

 Could it be possible to just pick up this piece of functionality of
 Vaadin and use it, and how ? (without using anything else of Vaadin).

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Re: LESS/ SASS/... style usage in GWT ?

2013-06-14 Thread RyanZA
Vaadin has a special linker that should let you use SASS. I haven't tried 
it though.

https://vaadin.com/blog/-/blogs/link-to-the-client-side-from-sass

On Friday, June 14, 2013 3:23:43 PM UTC+2, Ed wrote:

 Hi,
 I am curious how people use LESS/SASS/... etc.. in GWT i.c.m. GWT 
 Clientbundle mechanism?
 I looking into using this (never did before).
 Please share your experience? (setup, css parsing, experience, )



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Re: LESS/ SASS/... style usage in GWT ?

2013-06-14 Thread Ed


 Vaadin has a special linker that should let you use SASS. I haven't tried 
 it though.

https://vaadin.com/blog/-/blogs/link-to-the-client-side-from-sass

Thanks for reminding, I almost forgot it :(.
I am currious when this will also be available in the core gwt? As Vaadin 
is now now an  GWT contributor, what are the plans for these things ?

Could it be possible to just pick up this piece of functionality of Vaadin 
and use it, and how ? (without using anything else of Vaadin).

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Re: LESS/ SASS/... style usage in GWT ?

2013-06-14 Thread Ed Bras
I think the gwt dev team is thinking about CSS SASS support, from the
looks of issue 7624:
https://code.google.com/p/google-web-toolkit/issues/detail?id=7624
It hasn't become stale yet ... ;)


On Fri, Jun 14, 2013 at 4:19 PM, Ed post2edb...@gmail.com wrote:

 Vaadin has a special linker that should let you use SASS. I haven't tried
 it though.

 https://vaadin.com/blog/-/**blogs/link-to-the-client-side-**from-sasshttps://vaadin.com/blog/-/blogs/link-to-the-client-side-from-sass

 Thanks for reminding, I almost forgot it :(.
 I am currious when this will also be available in the core gwt? As Vaadin
 is now now an  GWT contributor, what are the plans for these things ?

 Could it be possible to just pick up this piece of functionality of Vaadin
 and use it, and how ? (without using anything else of Vaadin).

 --
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Re: LESS/ SASS/... style usage in GWT ?

2013-06-14 Thread Ryan Chazen
According to that article it will work without Vaadin, and just requires
that you replace 'widgetset' with 'module'. How exactly you'd go about
doing that is unclear and  I haven't tried, but the article definitely
seems to be saying that it should work without issue.
I've had plans to give it a try, but haven't had a reason to use SASS
recently so haven't tried it out yet. Let us know how it goes if you try.



On Fri, Jun 14, 2013 at 4:19 PM, Ed post2edb...@gmail.com wrote:

 Vaadin has a special linker that should let you use SASS. I haven't tried
 it though.

 https://vaadin.com/blog/-/**blogs/link-to-the-client-side-**from-sasshttps://vaadin.com/blog/-/blogs/link-to-the-client-side-from-sass

 Thanks for reminding, I almost forgot it :(.
 I am currious when this will also be available in the core gwt? As Vaadin
 is now now an  GWT contributor, what are the plans for these things ?

 Could it be possible to just pick up this piece of functionality of Vaadin
 and use it, and how ? (without using anything else of Vaadin).

 --
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Re: LESS/ SASS/... style usage in GWT ?

2013-06-14 Thread Ryan Chazen
It's been (erroneously) merged into issue 8162, which is just a generic
CSS3 issue. So I wouldn't get your hopes up too quickly.

https://code.google.com/p/google-web-toolkit/issues/detail?can=2q=8162colspec=ID%20Type%20Status%20Owner%20Milestone%20Summary%20Starsid=8162




On Fri, Jun 14, 2013 at 4:22 PM, Ed Bras post2edb...@gmail.com wrote:

 I think the gwt dev team is thinking about CSS SASS support, from the
 looks of issue 7624:
 https://code.google.com/p/google-web-toolkit/issues/detail?id=7624
 It hasn't become stale yet ... ;)


 On Fri, Jun 14, 2013 at 4:19 PM, Ed post2edb...@gmail.com wrote:

 Vaadin has a special linker that should let you use SASS. I haven't tried
 it though.

 https://vaadin.com/blog/-/**blogs/link-to-the-client-side-**from-sasshttps://vaadin.com/blog/-/blogs/link-to-the-client-side-from-sass

 Thanks for reminding, I almost forgot it :(.
 I am currious when this will also be available in the core gwt? As Vaadin
 is now now an  GWT contributor, what are the plans for these things ?

 Could it be possible to just pick up this piece of functionality of
 Vaadin and use it, and how ? (without using anything else of Vaadin).

 --
 You received this message because you are subscribed to a topic in the
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