Angular's modern SSR engine generates pre-rendered HTML on the server, ensuring search engine bots index content instantly. To implement this correctly for high-volume sites, you should look for professional Angular development services India to configure hydration boundaries.
Avoid Direct DOM Manipulations
When running on the server, APIs like `window` and `document` do not exist. Directly referencing `localStorage` or `querySelector` will crash your server process. Always inject the platform ID and check it before running client-only scripts:
import { Inject, PLATFORM_ID } from '@angular/core';
import { isPlatformBrowser } from '@angular/common';
constructor(@Inject(PLATFORM_ID) private platformId: Object) {
if (isPlatformBrowser(this.platformId)) {
const token = localStorage.getItem('token');
}
}
Leveraging State Transfer
Without TransferState, Angular will perform duplicate API requests. The first fetch happens on the server to render the HTML, and the second happens in the browser during hydration. TransferState packages server-fetched data into the HTML header so the browser hydrator can load it instantly.
