gulp-sniffer - check css exemples

check-css.js

var gulp = require('gulp'),
    sniffer = require('gulp-sniffer');

var sniffs = {
    'Use lighter|normal|bold instead of 100-900 for font-weight': function(content) {
        return content.match(/font-weight: \d+/);
    }
}

gulp.task('check-css', function() {
    gulp.src('src/**/*.css')
    .pipe(sniffer(sniffs))
    .pipe(gulp.dest('dist/'))
});