gulp.task('browserify', function() {

     return browserify({ entries: ['./admin/js/init.js'] })

        .transform(babelify.configure({
            presets: ["es2015"],
            ignore: '/js/lib/',
        }))

        .bundle()

        .on('error', function(err){
            // print the error (can replace with gulp-util)
            console.log(err.message);
            console.log('Full error: ', err);
            // end this stream
            this.emit('end');
        })

        .pipe(source('bundle.js'))
        .pipe(gulp.dest('./admin/js/'))
        .pipe(notify({ message: 'Bundle JS processed!'}));

        return;

});