Existing Blazor Web Assembly Web APP Not Run in the MAUI Blazor Hybrid Project

Question

I already have an existing Blazor Web Assembly project running perfectly.

Now my target is to run the same code in a MAUI Blazor Hybrid App.

To build this project I've implemented the following project structure:

1- API client
2- WebApp Blazor Client project
3- MAUI app
4- Shared.core.UI
5- Shared.core.Services.

I have two index.html files, the first in the WebApp project and the second in the MAUI app project.

I also added the webview.js script to the index.html in the MAUI app project.

When I run the emulator the app crashes with no error.

Any suggestions please?

I've tried removing the javascript file from the index.html in the MAUI app project.

We can not know your project only by the words so can you provide some codes? Besides, did you use the debug mode to test the project? — Guangyu Bai - MSFT
– Guangyu Bai - MSFT, Commented Jun 15, 2023 at 7:47
Yes i found this error. Uncaught (in promise) TypeError: window.external.receiveMessage is not a function at blazor.webview.js:1:40417 at Object.st [as start] (blazor.webview.js:1:40735) — shabbir Desap
– shabbir Desap, Commented Jun 15, 2023 at 11:22
This seems like an issue about JavaScript. You can check the question about Uncaught (in promise): TypeError: myFunction is not a function. — Guangyu Bai - MSFT
– Guangyu Bai - MSFT, Commented Jun 16, 2023 at 6:09

MH Rastegari · Accepted Answer · 2023-06-22 09:21:46Z

1

You can try using BitPlatform Templates which allows you to have Blazor WASM, Server, Hybrid and Electron from one code base.

https://bitplatform.dev/todo-template/getting-started

answered Jun 22, 2023 at 9:21

MH Rastegari

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1 Comment

shabbir Desap Over a year ago

I can not start my project from scratch I did a lot of work for blazor web assembly.

sanepete · Accepted Answer · 2025-03-12 11:03:47Z

0

If I've understood your current project architecture correctly, I believe you need to start a new Visual Studio 2022 solution using the '.NET MAUI Blazor hybrid and Web App' template, called 'myawesomeproject'.
If it's not on the list, update Visual Studio.
Copy the code from your old MAUI project to the new 'myawesomeproject' project.
Copy the Shared.core.UI code to the 'myawesomeproject.Shared' project.
Copy the 'WebApp Blazor Client' code to the 'myawesomeproject.Web' project.
Add both the 'API client' and the 'Shared.core.Services' projects to the myawesomeproject solution.

Without knowing the contents of you current projects, this isn't 100% guaranteed, though.

answered Mar 12 at 11:03

sanepete

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