gulpfile.js

var gulp = require('gulp'),
    autoprefixer = require('gulp-autoprefixer'),
    minifycss = require('gulp-minify-css'),
    uglify = require('gulp-uglify'),
    livereload = require('gulp-livereload'),
    rename = require('gulp-rename'),
    concat = require('gulp-concat'),
    notify = require('gulp-notify'),
    cache = require('gulp-cache'),
    del = require('del');

// Styles
gulp.task('styles', function() {
  return gulp.src('css/main.css')
    .pipe(autoprefixer('last 2 version', 'safari 5', 'ie 8', 'ie 9', 'opera 12.1', 'ios 6', 'android 4'))
    .pipe(gulp.dest('dist/css'))
    .pipe(rename({ suffix: '.min' }))
    .pipe(minifycss())
    .pipe(gulp.dest('dist/css'))
    .pipe(notify({ message: 'Styles task complete' }));
});

gulp.task('scripts', function() {
  return gulp.src([
    'js/models/model.js',
    'js/collections/selectedcollection.js',
    'js/collections/resultcollection.js',
    'js/views/selectedfoodview.js',
    'js/views/foodview.js',
    'js/views/appview.js',
    'js/app.js'
    ])
    .pipe(concat('main.js'))
    .pipe(gulp.dest('dist/js'))
    .pipe(rename({ suffix: '.min' }))
    .pipe(uglify())
    .pipe(gulp.dest('dist/js'))
    .pipe(notify({ message: 'Scripts task complete' }));
});

gulp.task('clean', function(cb) {
    del(['dist/css', 'dist/js'], cb)
});

gulp.task('default', ['clean'], function() {
    gulp.start('styles', 'scripts', 'images');
});

// Watch
gulp.task('watch', function() {

  // Watch .scss files
  gulp.watch('css/*.css', ['styles']);

  // Watch .js files
  gulp.watch('js/*.js', ['scripts']);

  // Create LiveReload server
  livereload.listen();

  // Watch any files in dist/, reload on change
  gulp.watch(['dist/**']).on('change', livereload.changed);

});