My apologies, apparently the syntax that Matt provided is also valid. Just an 
alternate syntax that I wasn’t aware of. 

Thanks
-Mark

Sent from my iPhone

> On Dec 22, 2021, at 10:17 AM, Mark Payne <marka...@hotmail.com> wrote:
> 
> Just a slight clarification on the syntax. I think the maven command is: 
> 
> mvn clean install -P!minify-and-compress
> 
> But you may need to escape the ! So you may need to run 
> 
> mvn clean install -P\!minify-and-compress
> 
> Thanks
> -Mark
> 
> Sent from my iPhone
> 
>> On Dec 22, 2021, at 10:03 AM, Matt Gilman <matt.c.gil...@gmail.com> wrote:
>> 
>> Hi Roy,
>> 
>> By default, the maven build will minify and aggregate all the front-end
>> resources. There is a profile that you can (de)activate to instead bundle
>> the resources as they are in the source. This should look something like:
>> 
>> mvn clean install -P-minify-and-compress
>> 
>> When running the resulting build you should be able to inspect things with
>> DevTools and set breakpoints in the debugger. Subsequent iterations can be
>> made faster by only building the necessary modules needed to bundle a new
>> front-end. Specifically, that is nifi-web-ui (don't forget to deactivate
>> minify-and-compress) and nifi-server-nar. The resulting NAR from the target
>> directory in nifi-server-nar will need to be copied to the lib directory of
>> your previously built assembly.
>> 
>> Unfortunately, there is no way to run just the front-end in a dev server
>> decoupled from the backed. The NiFi front-end sources are in JSPs which
>> generate markup server side.
>> 
>> Hope this helps.
>> 
>> Matt
>> 
>>>> On Tue, Dec 21, 2021 at 10:24 PM Roy Huang <royhuang8...@gmail.com> wrote:
>>> 
>>> Hi everyone
>>> 
>>> I want to modify some css style in nifi, but I don't know how to run it in
>>> a dev environment, can you help me with that? I'm a front-end developer and
>>> don't know about java maven.
>>> 

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