Angular Universal Ngcc Failed

Understanding Angular Universal and its Role in Web Development

Angular Universal is a technology that allows developers to run their Angular applications on both the client-side and the server-side. This means that the application can run in the browser as well as on the server, which has a number of benefits.

One of the main advantages of using Angular Universal is that it improves the performance and the user experience of the application. By rendering the initial HTML on the server-side and sending it to the client, the application can be loaded faster and users can start interacting with it sooner.

Another benefit of using Angular Universal is that it makes the application more accessible to search engines and social media crawlers. When the application is rendered on the server-side, the HTML is fully populated with content and metadata, which is important for SEO and sharing on social media.

Overall, Angular Universal is an important technology for web developers who want to build fast, performant, and accessible web applications. With its ability to run applications on both the client-side and the server-side, Angular Universal is a must-have tool for modern web development.

Here’s the HTML code for the content:

What is NGCC and How does it Affect Your Angular App?

NGCC stands for Next Generation Compatibility Compiler. It is an Angular tool that helps to make Angular libraries compatible with Ivy, the new Angular compiler. Ivy is the default compiler that was introduced in Angular 9. It provides improved build and rendering performance and supports tree-shaking. However, some Angular libraries are written using the previous View Engine compiler and may not be compatible with Ivy. This is where NGCC comes into play.

NGCC analyzes the dependencies of an Angular app or library and updates the code to be compatible with Ivy. It performs the necessary conversions such as changing decorators, rewriting import/export statements, and updating metadata files. NGCC runs automatically during the build process of an Angular app, so you don’t need to manually run it yourself.

So, why does NGCC matter for your Angular app? If your app or library uses Angular dependencies that were written using the View Engine compiler, it may not work properly with Ivy. You may experience errors or performance issues. NGCC ensures that those dependencies are updated automatically to work with Ivy, improving your app’s performance and stability.

Common Causes of the NGCC Failed Error in Angular Universal

If you have been working with Angular Universal, you might have encountered the NGCC Failed Error. This error usually occurs when you try to build the application using the AOT (Ahead-of-Time) compiler. The NGCC tool is responsible for converting the node_modules package files to a format that can be used with the AOT compiler.

There are several reasons why the NGCC Failed Error might occur. Here are a few common causes and their solutions:

  1. Outdated Packages: If you are using outdated packages, the NGCC tool might fail. Make sure that you are using the latest version of the packages.
  2. Incorrect Configuration: Make sure that the configuration of your Angular Universal application is correct. Check the tsconfig.json file and make sure that all the paths are set correctly.
  3. Large Application: If you have a large application, the NGCC tool might take a long time to run. You can increase the memory limit of the Node.js process by setting the NODE_OPTIONS environment variable.
  4. Invalid Package: If there is an invalid package in the node_modules directory, the NGCC tool might fail. Remove the invalid package and try again.
  5. Missing Dependencies: If there are dependencies missing in the package.json file, the NGCC tool might fail. Make sure that all the required dependencies are listed in the package.json file.

By identifying and resolving these common causes of the NGCC Failed Error, you can successfully build your Angular Universal application using the AOT compiler.

Troubleshooting NGCC Failed Error: Best Practices and Tips

If you are working with Angular and attempting to use Universal, you might have come across the NGCC failed error. This error occurs when the Angular Compatibility Compiler (NGCC) fails to analyze and process third-party libraries that have not been updated to work with Angular 9 or later.

Best Practices to Avoid NGCC Failed Error

  • Update third-party libraries: Make sure that all third-party libraries you are using are updated to work with Angular 9 or later. Check the library’s documentation for compatibility information.
  • Use compatible versions: Make sure that the version of Angular you are using is compatible with the version of the third-party libraries you are using. Check the Angular documentation for compatibility information.
  • Use AOT compilation: Ahead-of-time (AOT) compilation can help avoid NGCC errors by compiling the code to run in the browser without requiring further compilation. Use the –aot flag when building.

Tips for Troubleshooting NGCC Failed Error

  • Check NGCC logs: The NGCC logs can provide insight into why the error occurred. Look at the logs for errors or warnings and try to address them.
  • Remove the problematic library: If a specific library is causing the NGCC error, try removing it from your application to see if the error goes away. You can then look for an updated version or an alternative library.
  • Clear cache: Running the command ngcc –clean can clear the Angular Compiler Cache, which can sometimes fix NGCC errors.

How to Fix NGCC Failed Error in Angular Universal: A Step-by-Step Guide

If you’re building server-side rendered Angular applications with Angular Universal, you may have encountered the “NGCC failed” error when trying to build your project. This error occurs when the Angular Compiler is unable to generate the required metadata for some third-party packages.

To fix this issue, you can follow these steps:

  1. Identify the packages causing the error: Look at the error message to identify which packages are causing the NGCC failure. Usually, the error message will include the name of the package or packages that failed the compilation.
  2. Check for package updates: Check if there are updates available for the packages causing the issue. You can do this by visiting the official website or repository of the package and checking if there are any new releases or updates available.
  3. Try upgrading the package: If updates are available for the packages, try upgrading to the latest version. This can often resolve NGCC failures as the newer versions of the package may have fixed any compilation issues with the required metadata.
  4. Check compatibility: Check if the version of the package causing NGCC failures is compatible with the version of Angular your project is using. In some cases, using an incompatible version could cause the NGCC failure.
  5. Disable Ivy: If none of the above solutions work, try disabling Ivy in your project’s tsconfig.json file. Add the following line: "enableIvy": false. This will disable the Angular Ivy compilation engine and use the older View Engine compiler instead.

By following these steps, you should be able to fix the NGCC failed error in Angular Universal and continue building server-side rendered Angular applications.

Preventing NGCC Failed Error in Angular Universal: Best Coding Practices

When developing with Angular Universal, developers may encounter the NGCC Failed Error, which occurs when Angular Universal is unable to process and convert the NgModule’s metadata to the appropriate format. This can often lead to serious performance issues and even break the application.

To prevent the NGCC Failed Error, developers must adhere to best coding practices when developing with Angular Universal:

  • Write modular code and keep the NgModule’s metadata as simple as possible
  • Maintain the latest version of Angular and Angular Universal
  • Use ahead-of-time (AOT) compilation in development and production environments
  • Be aware of the dependencies used in the application and ensure compatibility with Angular Universal
  • Ensure all libraries used in the application are compatible with Angular Universal
  • Monitor the console for any NGCC Failed Errors and resolve them as soon as possible

By following these coding practices, developers can prevent the NGCC Failed Error and ensure that their Angular Universal application runs smoothly and efficiently.

Here’s the HTML code for “Advanced Techniques: Building Angular Universal Apps without NGCC in 2021” as a H2:


Advanced Techniques: Building Angular Universal Apps without NGCC in 2021


When it comes to building Angular Universal apps, the NGCC (Angular Ivy compatibility compiler) is a crucial tool that helps to compile the application and its dependencies. However, in some cases, NGCC can fail to properly compile the app and prevent it from running correctly.

Fortunately, there are advanced techniques that developers can use to bypass NGCC and still build robust Angular Universal apps. With careful considerations around app architecture and module management, developers can create highly performant apps without relying on NGCC.

In this blog post titled “Angular Universal NGCC Failed”, we’ll explore some of the advanced techniques that developers can use to build Angular Universal apps without NGCC in 2021. Stay tuned for valuable insights and practical tips that will help you take your Angular app development skills to the next level!

Leave a Comment