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By default, this service does nothing. You should include a the tapestry-yuicompressor library (for Tapestry 5.3) or tapestry-webresources (for Tapestry 5.4) library, which makes it possible to minimize CSS and JavaScript files.

<dependency>
    <groupId>org.apache.tapestry</groupId>
    <artifactId>tapestry-yuicompressor</artifactId>
    <version>5.3.1</version>
</dependency>

<dependency>
    <groupId>org.apache.tapestry</groupId>
    <artifactId>tapestry-webresources</artifactId>
    <version>5.4</version>
</dependency>

By adding this dependency, all your JavaScript and CSS files will be minimized when PRODUCTION_MODE=true. You can force the minimization of these files, by changing the value of the constant SymbolConstants.MINIFICATION_ENABLED in your module class (usually AppModule.java):

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