Скачать или смотреть How to Fix Empty Page Source Issues After Deploying Angular Universal Apps on Azure

Struggling with empty page source in your deployed Angular Universal app on Azure? This guide explains the common causes and how to solve the issue for proper server-side rendering.
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How to Fix Empty Page Source Issues After Deploying Angular Universal Apps on Azure

If you've recently deployed your Angular Universal app on Azure and found that the page source is empty — unlike the robust HTML generated locally — you're not alone. This scenario can be frustrating, especially when using features like dynamic meta tags that rely on the server-side rendering (SSR) capabilities of Angular. In this post, we will explore the problem in detail and provide you with a straightforward solution to restore your application to its expected behavior.

Understanding the Problem

While working on an Angular Universal app, developers experience two different environments: local development and production deployment.

On Localhost: When you run your Angular app locally, everything functions as intended. You can see the <app-root> element filled with Angular components and the meta tags populated when viewing the page source.

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On Azure Deployment: However, once deployed on Azure, the results can be starkly different. The page source shows an empty <app-root> without any Angular components or updated meta tags:

[[See Video to Reveal this Text or Code Snippet]]

This discrepancy often leads developers to question what might be causing this issue.

Diagnosing the Cause

The problem typically lies in the deployment setup on Azure Pipelines. Many guides suggest simply copying main.js from the project's server folder. However, this approach is insufficient for ensuring that Angular Universal's SSR features work correctly. Because of this, you may face issues with outputting the expected HTML and meta tags.

The Solution: Modify Your Azure Build Pipeline

To restore the expected functionality of your Angular Universal app, you’ll need to ensure the entire server folder is copied during the build process. Follow these steps:

Access Azure Pipelines: Log into your Azure portal and navigate to the Azure Pipelines section where your project is set up.

Modify Build Pipeline Configurations: Instead of just copying main.js, modify your Azure build pipeline to:

Copy the entire server folder from your project.

Example configuration step:

[[See Video to Reveal this Text or Code Snippet]]

Rebuild and Redeploy: Once you have updated your pipeline configurations, rebuild and redeploy your application to Azure.

Test the Deployment: After redeployment, check the page source again. You should now see the appropriate HTML content and updated meta tags.

Conclusion

Deploying your Angular Universal app to Azure should not lead to an empty page source. By ensuring that the entire server folder is included in your deployments, you can maintain the proper functionality of server-side rendering and dynamic meta tags. This adjustment to your Azure Pipelines will bring your app in line with the expectations you have while developing locally.

If you have any other issues or unique errors related to Angular or Azure deployments, feel free to share them in the comments. Happy coding!