Fixing Angular 10 Changes Not Reflecting When Deployed in IIS

Описание: Learn how to resolve issues with `Angular 10` changes not reflecting in the browser when deployed to IIS. Simple steps to ensure code updates are visible.
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This video is based on the question https://stackoverflow.com/q/63179959/ asked by the user 'Bhanu Banda' ( https://stackoverflow.com/u/4663330/ ) and on the answer https://stackoverflow.com/a/63272594/ provided by the user 'Bhanu Banda' ( https://stackoverflow.com/u/4663330/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Troubleshooting Angular 10 Deployment Issues in IIS

When working with Angular applications, developers sometimes encounter a frustrating issue: code changes, whether in HTML or JavaScript files, do not reflect in the browser after deployment to IIS. This can result in exported applications displaying outdated information, leading to confusion, lost productivity, and potentially unsatisfied users. In this guide, we will explore why this happens and how you can ensure your code changes are accurately reflected in your deployed application.

The Problem

You might have experienced something similar to the following scenario:

You make changes to your Angular components, modifying your HTML and JavaScript files to add new functionality or update existing content.

After completing these changes, you rebuild your project and deploy it to IIS.

You open up a browser, navigate to your application, and find that old versions of your components are being rendered instead of the latest updates—despite refreshing the browser and clearing the cache.

This can be a discouraging situation, especially when you've put in significant effort to improve your application. Let's delve into some common causes and their corresponding solutions.

Common Causes and Solutions

1. Caching Issues

One of the primary reasons for changes not being reflected is browser or server caching. When you deploy your application, both the browser and IIS may cache older versions of files, preventing new updates from being displayed. Here’s how to handle it:

Clear Browser Cache: Sometimes, cookies or old files may prevent new changes from rendering. Use the shortcut Ctrl + F5 in your browser to do a hard refresh, which forces it to load the latest content.

IIS Cache Settings: Ensure that your IIS server settings are configured to minimize caching. This can typically be adjusted in the web.config file or through IIS manager.

2. Building and Deploying Process

If you're experiencing deployment issues, you might not be building your project correctly. Here’s a checklist to ensure that your deployment process is sound:

Rebuild the Project: Always rebuild your Angular project after making changes. To do this in Visual Studio 2019:

Right-click on your project in the Solution Explorer.

Select Rebuild to compile the new changes.

Deploy the Latest Artifacts: Make sure you are deploying the entirety of the updated output directory, which contains the latest compiled JavaScript and HTML files.

3. Refreshing the Application

After making the necessary changes and redeploying, always refresh your application like this:

Use Browser Developer Tools: Open the DevTools console in your browser, go to the Network tab, and enable the Disable cache option while DevTools is open. This ensures you're viewing the most recent files.

Session Expiry: Log out and log back into your application to ensure that a session expiry doesn’t lead to displaying outdated data.

4. Persistent Workaround

If changes still do not reflect consistently, consider adopting a workaround until a more permanent solution is established. As a temporary fix, you can rebuild the project every time you make changes before deployment. Although not ideal, it can save time while debugging the underlying issues.

Conclusion

Encountering issues where Angular changes are not reflected in a deployed IIS application can be disheartening, but by following the protocols outlined above, you can significantly mitigate the problem. Understanding caching mechanisms, ensuring proper build and deploy processes, and utilizing the right browser tools can help streamline your workflow and enhance user experience.

If you find yourself frequently facing th