D-Net

// Load zone.js for the server.

import 'zone.js/dist/zone-node';

import 'reflect-metadata';

import { readFileSync, writeFileSync, existsSync, mkdirSync } from 'fs';

import { join } from 'path';

import { enableProdMode } from '@angular/core';

// Faster server renders w/ Prod mode (dev mode never needed)

enableProdMode();

// Express Engine

import { ngExpressEngine } from '@nguniversal/express-engine';

// Import module map for lazy loading

import { provideModuleMap } from '@nguniversal/module-map-ngfactory-loader';

import { renderModuleFactory } from '@angular/platform-server';

import { ROUTES } from './static.paths';

// * NOTE :: leave this as require() since this file is built Dynamically from webpack

const BROWSER_FOLDER = join(process.cwd(), 'browser');

// Load the index.html file containing referances to your application bundle.

const index = readFileSync(join('browser', 'index.html'), 'utf8');

let previousRender = Promise.resolve();

// Iterate each route path

ROUTES.forEach(route => {

  // Make sure the directory structure is there

  if(!existsSync(fullPath)){

    mkdirSync(fullPath);

  }

  // Writes rendered HTML to index.html, replacing the file if it already exists.

  previousRender = previousRender.then(_ => renderModuleFactory(AppServerModuleNgFactory, {

    document: index,

    url: route,

    extraProviders: [

      provideModuleMap(LAZY_MODULE_MAP)

    ]

  })).then(html => writeFileSync(join(fullPath, 'index.html'), html));

});