gulpfile.js

var gulp = require('gulp');
var source = require('vinyl-source-stream');
var buffer = require('vinyl-buffer');
var stripDebug = require('gulp-strip-debug');
var uglify = require('gulp-uglify');
var concat = require('gulp-concat');
var notify = require('gulp-notify');
var notifier = require('node-notifier');
var browserify = require('browserify');
var babelify = require('babelify');
var stringify = require('stringify');
var gutil = require('gulp-util');
var gif = require('gulp-if');
var plumber = require('gulp-plumber');
var yargs = require('yargs');

var config = {

    ROOT_SRC_INDEX: './src/main/resources/static/js/index.js',

    WATCH_DIRECTORY: './src/main/resources/static/js/**',

    OUTPUT: './target/classes/static/build/',

    production: yargs.argv.production,

    vendor: [
        './node_modules/jquery/dist/jquery.js',
        './node_modules/knockout/build/output/knockout-latest.debug.js',
        './node_modules/knockout-mapping/dist/knockout.mapping.js',
        './node_modules/knockout.validation/dist/knockout.validation.js'
    ]

};

gulp.task('js-app', function (){


    return browserify({entries: config.ROOT_SRC_INDEX, extensions: ['.js']})
        .transform(babelify, {presets: ['es2015']})
        .transform(stringify, {
            appliesTo: {includeExtensions: ['.html']},
            minify: true
        })
        .bundle().on('error', function(err){
            gutil.log(err.stack);
            var message = err.filename + "\n" + "Position:\n\tline = " + err.loc.line + "\n\tcolumn = " + err.loc.column + "\n";
            notifier.notify({ title: 'JavaScript Compilation Error', message: message });
            this.emit('end');
        })
        .pipe(plumber())
        .pipe(source('bundle.js'))
        .pipe(buffer())
        .pipe(config.production ? stripDebug() : gutil.noop())
        .pipe(config.production ? uglify() : gutil.noop())
        .pipe(gulp.dest(config.OUTPUT))
        .pipe(notify({title: "JavaScript Compilation Successful", message: "bundle.js - complete"}));
});

gulp.task('js-vendor', function(){

        return gulp.src(config.vendor)
            .pipe(concat('vendor.js'))
            .pipe(config.production ? uglify() : gutil.noop())
            .pipe(gulp.dest(config.OUTPUT))
            .pipe(notify({title: "JavaScript Compilation Successful", message: "vendor.js - complete"}));

});

gulp.task('watch', function() {
    gulp.watch(config.WATCH_DIRECTORY, ['js-app']);
});

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

index.js

// editing the file
require('./utilities.js');

console.log(pdmp);

require('./user-management/delegates.js');
require('./user-management/profile.js');
require('./user-management/groups.js');
require('./user-management/roles.js');
require('./user-management/users.js');