code: function cssnext() {
    const plugins = [
      require('postcss-import'),
      require('postcss-base64')({
        extensions: ['.svg'],
        root: __dirname + '/src/components/'
      }),
      cssnextPlugin({
        browsers: babelrc.presets[0][1].targets.browsers,
      }),
      reporter({
        clearAllMessages: true,
        clearReportedMessages: true,
        throwError: false
      })
    ];
  
    return gulp.src('src/{*-,}onsen-css-components.css', cwdOption)
      //.pipe(plumber()) // this was causing the task to never complete with gulp 4, but why...?
      .pipe(postcss(plugins))
      //.pipe(gulp.dest('./build/'))
      .pipe(gulp.dest(prefix))
      .pipe(browserSync.stream());
  }
docs: ////////////////////////////////////// cssnext //////////////////////////////////////