npm install postcss --save-dev
script
module.exports = {
plugins: [
require('autoprefixer'),
require('cssnano')
]
}
<plugin>
<groupId>com.github.eirslett</groupId>
<artifactId>frontend-maven-plugin</artifactId>
<version>1.12.0</version>
<executions>
<execution>
<id>install node and npm</id>
<goals>
<goal>install-node-and-npm</goal>
</goals>
<configuration>
<nodeVersion>v14.17.4</nodeVersion>
<npmVersion>7.20.3</npmVersion>
</configuration>
</execution>
<execution>
<id>PostCSS</id>
<goals>
<goal>npm</goal>
</goals>
<configuration>
<arguments>run postcss</arguments>
</configuration>
</execution>
</executions>
</plugin>
mvn clean install
