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Angular Universal Getting Error You Must Pass In A Ngmodule Or Ngmodulefactory To Be Bootstrapped

If you're working with Angular Universal and facing an error message saying, "You must pass in a NgModule or NgModuleFactory to be bootstrapped," don't worry! This common issue can be easily resolved with a few adjustments in your Angular code.

Angular Universal allows you to run your Angular application on the server, enabling server-side rendering for better performance and SEO optimization. However, when you encounter the "NgModule or NgModuleFactory" error, it means there is an issue with how the application is being bootstrapped.

To resolve this error, you need to make sure that you are bootstrapping your application correctly with the appropriate NgModule or NgModuleFactory. The error message indicates that the bootstrapping process is missing this essential information.

To fix this error, follow these steps:

1. Check your `main.ts` file:
Make sure that your `main.ts` file, which serves as the entry point of your Angular application, is correctly configured. Look for the `platformBrowserDynamic().bootstrapModule` function and ensure that you are passing the main NgModule of your application.

Example:

Typescript

import { AppModule } from './app/app.module';
    import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';

    platformBrowserDynamic().bootstrapModule(AppModule)
      .catch(err => console.error(err));

2. Verify NgModule configuration:
Double-check the configuration of your NgModule in the `app.module.ts` file. Ensure that it is correctly defined with all the necessary components, directives, and services.

Example:

Typescript

import { NgModule } from '@angular/core';
    import { BrowserModule } from '@angular/platform-browser';
    import { AppComponent } from './app.component';

    @NgModule({
      declarations: [
        AppComponent
      ],
      imports: [
        BrowserModule
      ],
      providers: [],
      bootstrap: [AppComponent]
    })
    export class AppModule { }

3. Ensure proper imports:
Check that you are importing the required Angular modules and components correctly in your application files. Any missing or incorrect imports can lead to the "NgModule or NgModuleFactory" error.

4. Run angular-cli commands:
If you are using Angular CLI, try running commands like `ng serve` or `ng build` to build and serve your application. This can sometimes help identify and resolve configuration issues.

By following these steps and ensuring that your Angular application is bootstrapped correctly with the necessary NgModule or NgModuleFactory, you should be able to resolve the "You must pass in a NgModule or NgModuleFactory to be bootstrapped" error in Angular Universal. Remember to pay attention to your application's configuration and imports to avoid such errors in the future. Happy coding!

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