server side rendering in agular

Server Side Rendering in Angular

Server Side Rendering (SSR) is a technique for rendering web pages on the server before sending them to the browser. In Angular, SSR can improve the performance and SEO of your application.

How to implement SSR in Angular?

There are two ways to implement SSR in Angular:

• Angular Universal: Angular Universal is the official solution for server-side rendering in Angular. It provides a pre-configured server that renders your application on the server and sends the rendered HTML to the browser.
• Custom Implementation: You can also implement SSR in Angular using your own custom implementation. This involves setting up a server and configuring it to render your application on the server.

Implementing SSR with Angular Universal

To implement SSR with Angular Universal, you need to follow these steps:

1. Install Angular Universal:
   

npm install @nguniversal/express-engine

1. Create a new module for server-side rendering:
   

ng g universal app-name

1. Update your app module to use the Universal module:
   

// Import the required modules
import { NgModule } from '@angular/core';
import { ServerModule } from '@angular/platform-server';
import { AppModule } from './app.module';
import { AppComponent } from './app.component';

@NgModule({
  imports: [
    AppModule,
    ServerModule
  ],
  bootstrap: [AppComponent]
})
export class AppServerModule {}

1. Create an Express server:
   

// Import the required modules
import 'zone.js/dist/zone-node';
import * as express from 'express';
import { join } from 'path';

// Import the Angular Universal module
import { ngExpressEngine } from '@nguniversal/express-engine';

// Import the main server-side rendered module
import { AppServerModule } from './src/main.server';

// Set up the Express server
const app = express();

// Define the static files path
const distFolder = join(process.cwd(), 'dist/browser');
app.use(express.static(distFolder, { index: false }));

// Configure the Angular Universal module
app.engine('html', ngExpressEngine({
  bootstrap: AppServerModule
}));

// Define the root route
app.get('*', (req, res) => {
  res.render('index', { req });
});

// Start the server
const port = process.env.PORT || 4000;
app.listen(port, () => {
  console.log(`Server listening on port ${port}`);
});

1. Build your application:
   

npm run build:ssr && npm run serve:ssr

Your Angular application is now using SSR with Angular Universal!