How to use the del.bind function in del

.pipe($.if('*.css', $.cleanCss({compatibility: '*'})))
  .pipe($.if('*.js', $.sourcemaps.init()))
  // .pipe($.if('*.js', $.uglify()))
  .pipe($.if('*.js', $.sourcemaps.write('.')))
  .pipe(gulp.dest('dist'));
});

gulp.task('babel', () => {
  return gulp.src('app/scripts.babel/**/*.js')
      .pipe($.babel({
        presets: ['es2015']
      }))
      .pipe(gulp.dest('app/scripts'));
});

gulp.task('clean', del.bind(null, ['.tmp', 'dist']));

gulp.task('watch', ['lint', 'babel'], () => {
  $.livereload.listen();

  gulp.watch([
    'app/*.html',
    'app/scripts/**/*.js',
    'app/images/**/*',
    'app/styles/**/*',
    'app/_locales/**/*.json'
  ]).on('change', $.livereload.reload);

  gulp.watch('app/scripts.babel/**/*.js', ['lint', 'babel']);
  gulp.watch('bower.json', ['wiredep']);
});

});

gulp.task('partials', ['styles'], function () {
  var assets = $.useref.assets({searchPath: '{.tmp,themes/src}'});

  return gulp.src('themes/src/layouts/**/*.html')
    .pipe(assets)
    .pipe($.if('*.js', $.uglify()))
    .pipe($.if('*.css', $.csso()))
    .pipe(assets.restore())
    .pipe($.useref())
    .pipe($.if('*.html', $.htmlclean()))
    .pipe(gulp.dest(theme + 'layouts/'));
});

gulp.task('clean', require('del').bind(null, [theme + 'layouts', theme + 'static/assets/css/*.css', theme + 'static/assets/*.js']));

gulp.task('watch', function () {
  // watch for changes
  gulp.watch([
    '*.html',
    theme + 'static/css/**/*.css',
    'scripts/**/*.js',
  ]).on('change', $.livereload.changed);

  gulp.watch('themes/src/styles/**/*.styl', ['styles']);
  gulp.watch('themes/src/scripts/**/*.js', ['scripts']);
  gulp.watch('themes/src/**/*.html', ['html']);
  gulp.watch('themes/src/**/*.html', ['partials']);
});

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

'baseDir': [ '.tmp', 'app', '.tmp_examples' ]
      },
      'ports': {
       'min': 9090,
       'max': 9090
      }
    });

    gulp.watch([srcFolder + '/**/*.html'], [ 'html:compile', reload ]);
    gulp.watch([srcFolder + '/**/*.{css,scss}'], ['styles']);
    gulp.watch(['.tmp/styles/**/*.css'], reload);
    gulp.watch([srcFolder + '/**/*.js'], [ 'js:compile', reload ]);
//    gulp.watch(['app/fonts/**/*'], ['fonts']);
  });

  gulp.task('clean', del.bind(null, [ '.tmp', 'test_out', distFolder ]));

  gulp.task('dist', ['clean'], function (cb) {
    runSequence('styles', [ 'html', 'fonts', 'images' ], cb);
  });


  gulp.task('default', [], function (cb) {
    runSequence('dist', cb);
  });

  gulp.task('test', ['bower'], function () {
    return gulp.src('./idontexist') // https://github.com/lazd/gulp-karma/issues/9
      .pipe($.karma({
        'configFile': './karma.conf.js',
        'autoWatch': false
      }))

var pkgs = (function() {
  var pkgs = {};
  var map = function(source) {
    for (var key in source) {
      pkgs[key.replace(/[^a-z0-9]/gi, '')] = source[key].substring(1);
    }
  };
  map(require('./package.json').dependencies);
  return pkgs;
}());

// The default task
gulp.task('default', ['serve']);

// Clean up
gulp.task('clean', del.bind(null, [DEST]));

// 3rd party libraries
gulp.task('vendor', function() {
  src.vendor = [
    'bower_components/todomvc-common/base.{js,css}',
    'bower_components/todomvc-common/bg.png'
  ];
  return merge(
    gulp.src(src.vendor)
      .pipe(gulp.dest(DEST + '/vendor')),
    gulp.src('./node_modules/bootstrap/dist/fonts/**')
      .pipe(gulp.dest(DEST + '/fonts'))
  );
});

// Static files

})))
        .pipe($.if('*.js', $.sourcemaps.init()))
        .pipe($.if('*.js', $.uglify()))
        .pipe($.if('*.js', $.sourcemaps.write('.')))
        .pipe(gulp.dest('dist'));
});

gulp.task('babel', () => {
    return gulp.src('app/scripts.babel/**/*.js')
        .pipe($.babel({
            presets: ['es2015']
        }))
        .pipe(gulp.dest('app/scripts'));
});

gulp.task('clean', del.bind(null, ['.tmp', 'dist']));

gulp.task('watch', ['lint', 'babel'], () => {
    $.livereload.listen();

    gulp.watch([
        'app/*.html',
        'app/scripts/**/*.js',
        'app/images/**/*',
        'app/styles/**/*',
        'app/_locales/**/*.json'
    ]).on('change', $.livereload.reload);

    gulp.watch('app/scripts.babel/**/*.js', ['lint', 'babel']);
    gulp.watch('bower.json', ['wiredep']);
});

.pipe($.if('*.css', $.cleanCss({compatibility: '*'})))
    .pipe($.if('*.js', $.sourcemaps.init()))
    .pipe($.if('*.js', $.uglify()))
    .pipe($.if('*.js', $.sourcemaps.write('.')))
    .pipe(gulp.dest('dist'));
});

gulp.task('babel', () => {
  return gulp.src('app/scripts.babel/**/*.js')
    .pipe($.babel({
      presets: ['es2015']
    }))
    .pipe(gulp.dest('app/scripts'));
});

gulp.task('clean', del.bind(null, ['.tmp', 'dist']));

gulp.task('watch', ['lint', 'babel'], () => {
  $.livereload.listen();

  gulp.watch([
    'app/*.html',
    'app/scripts/**/*.js',
    'app/images/**/*',
    'app/styles/**/*.css',
    'app/_locales/**/*.json'
  ]).on('change', $.livereload.reload);

  gulp.watch('app/scripts.babel/**/*.js', ['lint', 'babel']);
  gulp.watch('app/styles.scss/**/*.scss', ['styles']);
  gulp.watch('bower.json', ['wiredep']);
});

output: {
            filename: filename
        }});
        
    webpack(config,function (err,stats){
        
        if(err) throw new gutil.PluginError("webpack", err);
        
        gutil.log("[webpack]", stats.toString({
        }));
        
        callback();
    });
}

gulp.task('clean', del.bind(
  null, ['build/*'], {dot: true}
));

gulp.task('chrome',["chrome:assets","chrome:background","chrome:stop"]);

gulp.task("chrome:assets", function() {
    var assets = [
        "chrome/**/.css",
        "chrome/libs/**/*.js",
        "chrome/img/**/*",
        "chrome/**/*.css",
        "chrome/**/*.html",
        "chrome/**/*.json"
    ]
    
    return gulp.src(assets,{ base: "./chrome"})

exclude: 'index.manifest'
        }))
        .pipe(gulp.dest('dist'));
});

gulp.task('extras', function () {
    return gulp.src([
        'LICENSE',
        'src/*.*',
        '!src/*.html'
    ], {
        dot: true
    }).pipe(gulp.dest('dist'));
});

gulp.task('clean', del.bind(null, ['.tmp', 'dist']));

gulp.task('serve', ['styles', 'scripts', 'fonts'], function () {
    browserSync({
        notify: false,
        port: 9000,
        server: {
            baseDir: ['.tmp', 'src'],
            routes: {
                '/bower_components': 'bower_components'
            }
        }
    });

    gulp.watch([
        'src/*.html',
        'src/*.ico',

filter: '**/*.{eot,svg,ttf,woff,woff2}'
  }).concat('app/fonts/**/*'))
    .pipe(gulp.dest('.tmp/fonts'))
    .pipe(gulp.dest('dist/fonts'));
});

gulp.task('extras', () => {
  return gulp.src([
    'app/*.*',
    '!app/*.html'
  ], {
    dot: true
  }).pipe(gulp.dest('dist'));
});

gulp.task('clean', del.bind(null, ['.tmp', 'dist']));

gulp.task('serve', ['styles', 'fonts'], () => {
  browserSync({
    notify: false,
    port: 9000,
    server: {
      baseDir: ['.tmp', 'app'],
      routes: {
        '/bower_components': 'bower_components'
      }
    }
  });

  gulp.watch([
    'app/*.html',
    'app/scripts/**/*.js',