Fix is very quick and clean. In gulp_tasks/build.js pass additional parameters to cssnano:
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return gulp.src(conf.path.tmp('/index.html')) .pipe(inject(partialsInjectFile, partialsInjectOptions)) .pipe(useref({}, lazypipe().pipe(sourcemaps.init, {loadMaps: true}))) .pipe(jsFilter) .pipe(ngAnnotate()) .pipe(uglify({preserveComments: uglifySaveLicense})).on('error', conf.errorHandler('Uglify')) .pipe(rev()) .pipe(jsFilter.restore) .pipe(cssFilter) // 8<------ HERE .pipe(cssnano({ reduceIdents: { keyframes: false }, discardUnused: { keyframes: false } })) // ------>8 HERE .pipe(rev()) .pipe(cssFilter.restore) .pipe(revReplace()) .pipe(sourcemaps.write('maps')) .pipe(htmlFilter) .pipe(htmlmin()) .pipe(htmlFilter.restore) .pipe(gulp.dest(conf.path.dist())); |