@nguniversal/express-engine
Advanced tools
This is an Express Engine for running Angular Apps on the server for server side rendering.
npm install @nguniversal/express-engine --save
To use it, set the engine and then route requests to it
import express from 'express';
import { ngExpressEngine } from '@nguniversal/express-engine';
const app = express();
// Set the engine
app.engine(
'html',
ngExpressEngine({
bootstrap: ServerAppModule, // Give it a module to bootstrap
}),
);
app.set('view engine', 'html');
app.get('/**/*', (req: Request, res: Response) => {
res.render('../dist/index', {
req,
res,
});
});
It is possible to override the default URL and document fetched when the rendering engine
is called. To do so, simply pass in a url and/or document string to the renderer as follows:
app.get('/**/*', (req: Request, res: Response) => {
let url = 'http://someurl.com';
let doc = '<html><head><title>New doc</title></head></html>';
res.render('../dist/index', {
req,
res,
url,
document: doc,
});
});
Extra Providers can be provided either on engine setup
app.engine(
'html',
ngExpressEngine({
bootstrap: ServerAppModule,
providers: [ServerService],
}),
);
The Bootstrap module as well as more providers can be passed on request
app.get('/**/*', (req: Request, res: Response) => {
res.render('../dist/index', {
req,
res,
bootstrap: OtherServerAppModule,
providers: [OtherServerService],
});
});
The Request and Response objects are injected into the app via injection tokens. You can access them by @Inject
import { Request } from 'express';
import { REQUEST } from '@nguniversal/express-engine/tokens';
@Injectable()
export class RequestService {
constructor(@Inject(REQUEST) private request: Request) {}
}
If your app runs on the client side too, you will have to provide your own versions of these in the client app.
You can also use a custom callback to better handle your errors
app.get('/**/*', (req: Request, res: Response) => {
res.render(
'../dist/index',
{
req,
res,
},
(err: Error, html: string) => {
res.status(html ? 200 : 500).send(html || err.message);
},
);
});
16.1.3 (2023-08-09)
| Commit | Type | Description | | ------------------------------------------------------------------------------------------------ | ---- | ---------------------------------------------------- | | d4be69b8 | fix | check for server context when doing hybrid rendering |
<!-- CHANGELOG SPLIT MARKER --><a name="16.1.2"></a>
FAQs
Express Engine for running Server Angular Apps
The npm package @nguniversal/express-engine receives a total of 66,778 weekly downloads. As such, @nguniversal/express-engine popularity was classified as popular.
We found that @nguniversal/express-engine demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 2 open source maintainers collaborating on the project.
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