Thomas,
   
       Sorry for dumb question, but where should I put this @external 
reference?  I have Main.ui.xml and <ui:style> legacy CSS block. I have 
tried to do like this:
   <ui:style>
    @external .toolbar {
        background: #4285f4 !important;
    }
    
    @external .header {
        font-size: 200%;
        margin-left: 50px;
        background: #4285f4 !important;
    }
    
     @external.content {
        padding: 15px;
    }
    </ui:style>

      or put @external .header; outside <ui> block -- in all the cases I 
got compilation error. 

Thanks,
      

On Sunday, December 13, 2015 at 5:16:04 PM UTC+2, Thomas Broyer wrote:
>
> <ui:style> defines a CssResource, so class names will be obfuscated; that 
> may be the cause of your problem.
> Try using @external to mark the class so it's not obfuscated.
> See 
> http://www.gwtproject.org/doc/latest/DevGuideClientBundle.html#External_and_legacy_scopes;
>  
> and in case you're using the new GSS see the “External style classes” 
> section at http://www.gwtproject.org/doc/latest/DevGuideGssVsCss.html
>
> On Sunday, December 13, 2015 at 3:49:48 PM UTC+1, [email protected] wrote:
>>
>> Actually if I add any styling with <ui:style> notation FF stops to 
>> generate the output. I have blank pages. Can it be connected somehow to 
>> development mode I use?  I run "mvn gwt:run" and open default browser from 
>> the GWT application. 
>>  
>> On Sunday, December 13, 2015 at 12:11:53 PM UTC+2, [email protected] wrote:
>>>
>>> Hello all,
>>>
>>>          Doing tutorials I have found that Ripple effect with UI style 
>>> provided in example makes elements invisible.  I have tested with FireFox 
>>> 26 and 42 -- all the same.  At Google chrome everything works as expected. 
>>> Why this style blanks the page in FireFox?
>>>
>>>     <ui:style>
>>>     paper-icon-item {
>>>         position: relative;
>>>         overflow: hidden;
>>>     }
>>>     </ui:style>
>>>
>>>
>>>

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