Understanding Global Interactive Server Rendering

Oct 13, 2025 by wbrum.org 24 views

Introduction

Blazor Web App is a popular framework for building web applications using C# and Razor syntax. One of its key features is global interactive server rendering, which allows for seamless interaction between the client and server. However, in certain scenarios, the reconnection UI may not display as expected. In this article, we will explore the issue of reconnection UI not displaying when Blazor Web App is globally interactive.

Understanding Global Interactive Server Rendering

Global interactive server rendering is a feature in Blazor Web App that allows the server to render the initial HTML of the application and then send it to the client. The client can then interact with the application, and the server will receive the updates and render the changes. This approach provides a seamless user experience and allows for real-time updates.

Reconnection UI in Blazor Web App

The reconnection UI is a feature in Blazor Web App that allows the application to reconnect to the server in case of a disconnection. This is particularly useful in scenarios where the client and server are disconnected due to network issues or other reasons. The reconnection UI is typically displayed in the browser when the application is unable to reconnect to the server.

Issue with Reconnection UI in Globally Interactive Blazor Web App

When a Blazor Web App is globally interactive, the reconnection UI may not display as expected. This is because the globally interactive feature uses a different approach to handle disconnections and reconnections. In this scenario, the reconnection UI is not displayed in the browser, and the application may appear to be unresponsive.

Repro Steps

To reproduce the issue, follow these steps:

Create a new .NET 10 Preview 2 Blazor Web App: Create a new Blazor Web App project using the .NET 10 Preview 2 SDK. Make sure to select the "Blazor WebAssembly App" template and enable global interactive server rendering.
Run the app: Run the application and verify that it is working as expected.
Shut down the server process: Shut down the server process using the Task Manager or by pressing Ctrl+C in the terminal.
Verify the reconnection UI: Verify that the reconnection UI is not displayed in the browser.

Expected Result

The expected result is that the reconnection UI is displayed in the browser when the server process is shut down.

Actual Result

The actual result is that the reconnection UI is not displayed in the browser.

Possible Causes

There are several possible causes for this issue:

Incorrect configuration: The globally interactive feature may not be configured correctly, leading to issues with the reconnection UI.
Server-side rendering issues: There may be issues with the server-side rendering of the application, which can prevent the reconnection UI from displaying.
Client-side rendering issues: There may be issues with the client-side rendering of the application, which can prevent the reconnection UI from displaying.

Troubleshooting Steps

To troubleshoot this issue, follow these steps:

Verify the configuration: Verify that the globally interactive feature is configured correctly.
Check the server-side rendering: Check the server-side rendering of the application to ensure that it is working as expected.
Check the client-side rendering: Check the client-side rendering of the application to ensure that it is working as expected.
Enable debugging: Enable debugging in the application to get more information about the issue.

Conclusion

In conclusion, the reconnection UI may not display in a globally interactive Blazor Web App when the server process is shut down. This is due to the different approach used by the globally interactive feature to handle disconnections and reconnections. To troubleshoot this issue, verify the configuration, check the server-side and client-side rendering, and enable debugging.

Recommendations

To avoid this issue, follow these recommendations:

Use the correct configuration: Ensure that the globally interactive feature is configured correctly.
Test the application: Test the application thoroughly to ensure that it is working as expected.
Enable debugging: Enable debugging in the application to get more information about any issues that may arise.

Future Work

In the future, we plan to investigate this issue further and provide a solution to display the reconnection UI in globally interactive Blazor Web App.

Related Issues

This issue is related to the following issues:

Blazor Web App not reconnecting to server: This issue is related to the Blazor Web App not reconnecting to the server after a disconnection.
Reconnection UI not displaying: This issue is related to the reconnection UI not displaying in the browser.

API Documentation

The API documentation for this issue can be found in the following links:

Blazor Web App API documentation: This link provides the API documentation for the Blazor Web App.
Globally interactive feature API documentation: This link provides the API documentation for the globally interactive feature.

Code Snippets

The following code snippets demonstrate how to troubleshoot this issue:

// Verify the configuration
var config = new BlazorWebAppConfig();
config.GloballyInteractive = true;

// Check the server-side rendering
var serverRenderer = new ServerRenderer();
serverRenderer.RenderAsync();

// Check the client-side rendering
var clientRenderer = new ClientRenderer();
clientRenderer.RenderAsync();

// Enable debugging
var logger = new Logger();
logger.EnableDebugging();

FAQs

Q: How can I troubleshoot this issue? A: To troubleshoot this issue, verify the configuration, check the server-side and client-side rendering, and enable debugging.

Q: What is the globally interactive feature in Blazor Web App? A: The globally interactive feature in Blazor Web App allows the server to render the initial HTML of the application and then send it to the client. This feature enables real-time updates and seamless interaction between the client and server.

Q: Why is the reconnection UI not displaying in globally interactive Blazor Web App? A: The reconnection UI may not display in globally interactive Blazor Web App due to the different approach used by the globally interactive feature to handle disconnections and reconnections. This issue is specific to the globally interactive feature and may not occur in non-interactive Blazor Web App applications.

Q: How can I troubleshoot this issue? A: To troubleshoot this issue, follow these steps:

Verify the configuration: Ensure that the globally interactive feature is configured correctly.
Check the server-side rendering: Verify that the server-side rendering is working as expected.
Check the client-side rendering: Verify that the client-side rendering is working as expected.
Enable debugging: Enable debugging in the application to get more information about the issue.

Q: What are the possible causes of this issue? A: The possible causes of this issue include:

Incorrect configuration: The globally interactive feature may not be configured correctly, leading to issues with the reconnection UI.
Server-side rendering issues: There may be issues with the server-side rendering of the application, which can prevent the reconnection UI from displaying.
Client-side rendering issues: There may be issues with the client-side rendering of the application, which can prevent the reconnection UI from displaying.

Q: How can I fix this issue? A: To fix this issue, follow these steps:

Update the configuration: Update the configuration to ensure that the globally interactive feature is configured correctly.
Fix server-side rendering issues: Fix any server-side rendering issues that may be causing the problem.
Fix client-side rendering issues: Fix any client-side rendering issues that may be causing the problem.
Enable debugging: Enable debugging in the application to get more information about the issue.

Q: Is this issue specific to Blazor Web App? A: No, this issue is not specific to Blazor Web App. However, it is more likely to occur in globally interactive Blazor Web App applications.

Q: Can I use the reconnection UI in non-interactive Blazor Web App applications? A: Yes, you can use the reconnection UI in non-interactive Blazor Web App applications. However, the reconnection UI may not be as seamless as in globally interactive Blazor Web App applications.

Q: How can I improve the performance of my Blazor Web App application? A: To improve the performance of your Blazor Web App application, follow these steps:

Optimize the configuration: Optimize the configuration to ensure that the globally interactive feature is configured correctly.
Improve server-side rendering: Improve the server-side rendering of the application to reduce the load on the server.
Improve client-side rendering: Improve the client-side rendering of the application to reduce the load on the client.
Use caching: Use caching to reduce the number of requests made to the server.

Q: Can I use the reconnection UI in other frameworks? A: Yes, you can use the reconnection UI in other frameworks. However, the implementation may vary depending on the framework.

Q: How can I get more information about this issue? A: To get more information about this issue, follow these steps:

Check the documentation: Check the documentation for the globally interactive feature and the reconnection UI.
Check the API: Check the API for the globally interactive feature and the reconnection UI.
Check the community forums: Check the community forums for the globally interactive feature and the reconnection UI.
Contact support: Contact support for the globally interactive feature and the reconnection UI.