How to bundle an Angular app for production

2 to 14 (TypeScript) with Angular CLI

OneTime Setup

• npm install -g @angular/cli
• ng new projectFolder creates a new application

Bundling Step

• ng build (run in command line when directory is projectFolder).

  flag prod bundle for production is now the default (see the Angular documentation to customize it if needed).

• Compress using Brotli compression the resources using the following command

  for i in dist/*/*; do brotli $i; done

bundles are generated by default to projectFolder/dist(/$projectFolder for v6+)**

Output

Sizes with Angular 14.0.2 with CLI 14.0.2and option CSS without Angular routing

• dist/main.[hash].js Your application bundled [ size: 118 KB for new Angular CLI application empty, 36 KB compressed].
• dist/polyfill-[es-version].[hash].bundle.js the polyfill dependencies (@angular, RxJS...) bundled [ size: 34 KB for new Angular CLI application empty, 11 KB compressed].
• dist/index.html entry point of your application.
• dist/runtime.[hash].bundle.js webpack loader
• dist/style.[hash].bundle.css the style definitions
• dist/assets resources copied from the Angular CLI assets configuration

Deployment

You can get a preview of your application using the ng serve --prod command that starts a local HTTP server such that the application with production files is accessible using http://localhost:4200. This is not safe to use for production usage.

For a production usage, you have to deploy all the files from the dist folder in the HTTP server of your choice.

2.0.1 Final using Gulp (TypeScript - Target: ES5)

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OneTime Setup

• npm install (run in cmd when direcory is projectFolder)

Bundling Steps

• npm run bundle (run in cmd when direcory is projectFolder)

  bundles are generated to projectFolder / bundles /

Output

• bundles/dependencies.bundle.js [ size: ~ 1 MB (as small as possible) ]
  • contains rxjs and angular dependencies, not the whole frameworks
• bundles/app.bundle.js [ size: depends on your project, mine is ~ 0.5 MB ]
  • contains your project

File Structure

• projectFolder / app / (all components, directives, templates, etc)
• projectFolder / gulpfile.js

var gulp = require('gulp'),
  tsc = require('gulp-typescript'),
  Builder = require('systemjs-builder'),
  inlineNg2Template = require('gulp-inline-ng2-template');

gulp.task('bundle', ['bundle-app', 'bundle-dependencies'], function(){});

gulp.task('inline-templates', function () {
  return gulp.src('app/**/*.ts')
    .pipe(inlineNg2Template({ useRelativePaths: true, indent: 0, removeLineBreaks: true}))
    .pipe(tsc({
      "target": "ES5",
      "module": "system",
      "moduleResolution": "node",
      "sourceMap": true,
      "emitDecoratorMetadata": true,
      "experimentalDecorators": true,
      "removeComments": true,
      "noImplicitAny": false
    }))
    .pipe(gulp.dest('dist/app'));
});

gulp.task('bundle-app', ['inline-templates'], function() {
  // optional constructor options
  // sets the baseURL and loads the configuration file
  var builder = new Builder('', 'dist-systemjs.config.js');

  return builder
    .bundle('dist/app/**/* - [@angular/**/*.js] - [rxjs/**/*.js]', 'bundles/app.bundle.js', { minify: true})
    .then(function() {
      console.log('Build complete');
    })
    .catch(function(err) {
      console.log('Build error');
      console.log(err);
    });
});

gulp.task('bundle-dependencies', ['inline-templates'], function() {
  // optional constructor options
  // sets the baseURL and loads the configuration file
  var builder = new Builder('', 'dist-systemjs.config.js');

  return builder
    .bundle('dist/app/**/*.js - [dist/app/**/*.js]', 'bundles/dependencies.bundle.js', { minify: true})
    .then(function() {
      console.log('Build complete');
    })
    .catch(function(err) {
      console.log('Build error');
      console.log(err);
    });
});

• projectFolder / package.json (same as Quickstart guide, just shown devDependencies and npm-scripts required to bundle)

{
  "name": "angular2-quickstart",
  "version": "1.0.0",
  "scripts": {
    ***
     "gulp": "gulp",
     "rimraf": "rimraf",
     "bundle": "gulp bundle",
     "postbundle": "rimraf dist"
  },
  "license": "ISC",
  "dependencies": {
    ***
  },
  "devDependencies": {
    "rimraf": "^2.5.2",
    "gulp": "^3.9.1",
    "gulp-typescript": "2.13.6",
    "gulp-inline-ng2-template": "2.0.1",
    "systemjs-builder": "^0.15.16"
  }
}

• projectFolder / systemjs.config.js (same as Quickstart guide, not available there anymore)

(function(global) {

  // map tells the System loader where to look for things
  var map = {
    'app':                        'app',
    'rxjs':                       'node_modules/rxjs',
    'angular2-in-memory-web-api': 'node_modules/angular2-in-memory-web-api',
    '@angular':                   'node_modules/@angular'
  };

  // packages tells the System loader how to load when no filename and/or no extension
  var packages = {
    'app':                        { main: 'app/boot.js',  defaultExtension: 'js' },
    'rxjs':                       { defaultExtension: 'js' },
    'angular2-in-memory-web-api': { defaultExtension: 'js' }
  };

  var packageNames = [
    '@angular/common',
    '@angular/compiler',
    '@angular/core',
    '@angular/forms',
    '@angular/http',
    '@angular/platform-browser',
    '@angular/platform-browser-dynamic',
    '@angular/router',
    '@angular/router-deprecated',
    '@angular/testing',
    '@angular/upgrade',
  ];

  // add package entries for angular packages in the form '@angular/common': { main: 'index.js', defaultExtension: 'js' }
  packageNames.forEach(function(pkgName) {
    packages[pkgName] = { main: 'index.js', defaultExtension: 'js' };
  });

  var config = {
    map: map,
    packages: packages
  };

  // filterSystemConfig - index.asp's chance to modify config before we register it.
  if (global.filterSystemConfig) { global.filterSystemConfig(config); }

  System.config(config);

})(this);

• projetcFolder / dist-systemjs.config.js (just shown the difference with systemjs.config.json)

var map = {
    'app':                        'dist/app',
  };

• projectFolder / index.html (production) - The order of the script tags is critical. Placing the dist-systemjs.config.js tag after the bundle tags would still allow the program to run but the dependency bundle would be ignored and dependencies would be loaded from the node_modules folder.

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8"/>
  <meta name="viewport" content="width=device-width, initial-scale=1"/>
  <base href="/"/>
  <title>Angular</title>
  <link rel="stylesheet" type="text/css" href="style.css"/>
</head>
<body>

<my-app>
  loading...
</my-app>

<!-- Polyfill(s) for older browsers -->
<script src="node_modules/core-js/client/shim.min.js"></script>

<script src="node_modules/zone.js/dist/zone.min.js"></script>
<script src="node_modules/reflect-metadata/Reflect.js"></script>
<script src="node_modules/systemjs/dist/system.js"></script>

<script src="dist-systemjs.config.js"></script>
<!-- Project Bundles. Note that these have to be loaded AFTER the systemjs.config script -->
<script src="bundles/dependencies.bundle.js"></script>
<script src="bundles/app.bundle.js"></script>

<script>
    System.import('app/boot').catch(function (err) {
      console.error(err);
    });
</script>
</body>
</html>

• projectFolder / app / boot.ts is where the bootstrap is.

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The best I could do yet :)