Gulpfile.js example that splits vendor and app bundles

Gulpfile.js

var gulp = require('gulp');
var browserify = require('browserify');
var babelify = require('babelify');
var source = require('vinyl-source-stream');
var rename = require('gulp-rename');
var buffer = require('vinyl-buffer');
var uglify = require('gulp-uglify');
var gzip = require('gulp-gzip');
var concat = require('gulp-concat');
var bowerResolve = require('bower-resolve');
var nodeResolve = require('resolve');

gulp.task('default', ['build-vendor', 'build-app']);

gulp.task('build-vendor', function() {
    var b = browserify({ debug: false });

    // For Bower - https://github.com/sogko/gulp-recipes/blob/master/browserify-separating-app-and-vendor-bundles/gulpfile.js
    //b.require(bowerResolve.fastReadSync(id), { expose: id });

    b.require(nodeResolve.sync('jquery'), { expose: 'jquery' });
    b.require(nodeResolve.sync('moment'), { expose: 'moment' });
    b.require(nodeResolve.sync('react'), { expose: 'react' });
    b.require(nodeResolve.sync('react/addons'), { expose: 'react/addons' });
    b.require(nodeResolve.sync('react-onclickoutside'), { expose: 'react-onclickoutside' });
    b.require(nodeResolve.sync('reflux'), { expose: 'reflux' });
    b.require(nodeResolve.sync('react-datepicker'), { expose: 'react-datepicker' });

    var stream = b.bundle()
        .pipe(source('vendor.js'))
        .pipe(gulp.dest('./public/assets/js'))
        .pipe(buffer())
        .pipe(uglify())
        .pipe(rename('vendor.min.js'))
        .pipe(gulp.dest('./public/assets/js'));

    return stream;
});

gulp.task('build-app', function() {
    var b = browserify('./public/assets/js/app.js', { debug: false });

    b.external('jquery');
    b.external('moment');
    b.external('react');
    b.external('react/addons');
    b.external('react-onclickoutside');
    b.external('reflux');
    b.external('react-datepicker');

    var stream = b.transform(babelify, { stage: 0 })
        .bundle()
        .on('error', function(e){
            console.log(e.message);
            this.emit('end');
        })
        .pipe(source('bundle.js'))
        .pipe(gulp.dest('./public/assets/js'))
        .pipe(buffer())
        .pipe(uglify())
        .pipe(rename('bundle.min.js'))
        .pipe(gulp.dest('./public/assets/js'));
        //.pipe(gzip())
        //.pipe(gulp.dest('./public/assets/js'));

    return stream;
});

gulp.task('watch', function() {
    gulp.watch('public/assets/js/**/*.js', ['build-app']);
});