MAUI blazor an unhandled error has occurred

Question

If there is an error in the program, I get "An unhandled error has occured". With Blazor Web assembly I can open the developper tools in the browser to get the details of what happend. This is not possible in Blazor MAUI.

So how can I get the details of the error in Blazor MAUI?

Foresight

Just use F12 to open the dev tools. – Sorbitol

F12 has no effect – Foresight

What operating system? It works on my Blazor Maui apps. click in the window, then press F12 – Sorbitol

Answer 1

There is a way to "remotely inspect" your app using the browser developer tool (F12). First, check if you added the AddBlazorWebViewDeveloperTools in your MauiProgram.cs

#if DEBUG
    builder.Services.AddBlazorWebViewDeveloperTools();
#endif

Run your App and open a new tab in your browser (outside the emulator) and type:

• For Chrome: chrome://inspect
• For Edge: edge://inspect

Wait a little and you will see an "inspect" button like below:

And you can even navigate in your App from there:

Mouton

and how would you go about doing this if the app was in debug on a physical android device connected via usb ? – Ignazio

Answer 2

When you get this type of error:

First click the screen with your mouse, then hit F12. Then select the Console link a top of Dev Tools Form.

Disuse

This is the right & simplest answer. – Adria

How is that related? Question is about emulator and simulator and not we development – Guttural

Answer 3

You can open the developer tools by pressing ctrl + shift + i (or cmd + shift + i for Mac) when you have focus inside the web view.

Note: you need to enable the developer tools.

builder.Services.AddMauiBlazorWebView();

// enable the developer tools
builder.Services.AddBlazorWebViewDeveloperTools();
builder.Services.AddBlazorWebView();

Gelatinize

This does not work in MAUI. – Christensen

it does for me. I am using it right now. you may need to add the tools, I will update my answer with this information. – Gelatinize

@Gelatinize but I need to debug this on an iOS and android device – Woolly

@Woolly this solution will work when using a simulator...not sure how debugging works with real devices to be honest. Haven't messed with this in a while. – Gelatinize

Also does not work for me when running a MacCatalyst app (using Visual Studio for Mac 17.5.6) – Pavyer