[chromium] [INFO:CONSOLE(0)] "Failed to load module script: The server responded with a non-JavaScript MIME type of "";. Strict MIME type checking is enforced for module scripts per HTML spec

Question

[chromium] [INFO:CONSOLE(0)] "Failed to load module script: The server responded with a non-JavaScript MIME type of "";. Strict MIME type checking is enforced for module scripts per HTML spec

Kini G, Sudhindra (ADV D AA SGI PS EP-CP DAI APPS) 6

Steps to reproduce the problem:

Using Xamarin Webview to load URL.
Facing problems on Android APK < 30 with lower chrome version.
Unable to load Webview.

Problem Description:
Trying to launch a Xamarin.Android WebView using url "file://android_asset/www/index.html".

Recently upgraded UI to Angular v13, hence index.html <script> contains type="module".

Getting the following error :

"[chromium] [INFO:CONSOLE(0)] "Failed to load module script: The server responded with a non-JavaScript MIME type of "". Strict MIME type checking is enforced for module scripts per HTML spec.", source: file:///android_asset/www/polyfills.js" & other 3 modules.

This is a production app and needs to be fixed.

Please sugegst something.

Thanks.

Additional Comments:

Chrome version: 69.0.3497.100 Channel: Stable

OS:Android

Wenyan Zhang (Shanghai Wicresoft Co,.Ltd.) 36,431 Reputation points Microsoft External Staff

2022-08-18T08:06:50.59+00:00

This error only occurs after you upgraded Angular, right? Please check if you have set web_view.Settings.JavaScriptEnabled = true;. For more details , you can refer to Web View - Xamarin | Microsoft Learn
And you can check if there are server requests in your JS and check if you have set the proper content-type , such as : request.setHeader('Content-type', 'text/javascript')
Kini G, Sudhindra (ADV D AA SGI PS EP-CP DAI APPS) 6 Reputation points

2022-08-18T08:11:15.203+00:00

Hi, thanks for your comment.

Yes the issue is occuring after upgrading to angular 13. web_view.Settings.JavaScriptEnabled = true; has been set.
The app breaks on Android phones with APK < 29. The issue is sporadic again.

My app is a Xamarin based ionic app. Front-end we use ionic-angular.

We do not have a Server per se, but its like C# framework which acts as a server.

Xamarin android's webview does not identify type="module" and hence the MIME type error is thrown.
Wenyan Zhang (Shanghai Wicresoft Co,.Ltd.) 36,431 Reputation points Microsoft External Staff

2022-08-19T07:01:59.25+00:00

Hi @Kini G, Sudhindra (ADV D AA SGI PS EP-CP DAI APPS) , please post this at https://github.com/angular/angular for help. Or you can report it at https://github.com/xamarin/xamarin-android
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1 answer

Your answer

Wenyan Zhang (Shanghai Wicresoft Co,.Ltd.) 36,431 Reputation points Microsoft External Staff

2022-08-18T08:06:50.59+00:00

This error only occurs after you upgraded Angular, right? Please check if you have set web_view.Settings.JavaScriptEnabled = true;. For more details , you can refer to Web View - Xamarin | Microsoft Learn
And you can check if there are server requests in your JS and check if you have set the proper content-type , such as : request.setHeader('Content-type', 'text/javascript')
Kini G, Sudhindra (ADV D AA SGI PS EP-CP DAI APPS) 6 Reputation points

2022-08-18T08:11:15.203+00:00

Hi, thanks for your comment.

Yes the issue is occuring after upgrading to angular 13. web_view.Settings.JavaScriptEnabled = true; has been set.
The app breaks on Android phones with APK < 29. The issue is sporadic again.

My app is a Xamarin based ionic app. Front-end we use ionic-angular.

We do not have a Server per se, but its like C# framework which acts as a server.

Xamarin android's webview does not identify type="module" and hence the MIME type error is thrown.
Wenyan Zhang (Shanghai Wicresoft Co,.Ltd.) 36,431 Reputation points Microsoft External Staff

2022-08-19T07:01:59.25+00:00

Hi @Kini G, Sudhindra (ADV D AA SGI PS EP-CP DAI APPS) , please post this at https://github.com/angular/angular for help. Or you can report it at https://github.com/xamarin/xamarin-android
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This comment has been deleted due to a violation of our Code of Conduct. The comment was manually reported or identified through automated detection before action was taken. Please refer to our Code of Conduct for more information.

Answer 1

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[chromium] [INFO:CONSOLE(0)] &#34;Failed to load module script: The server responded with a non-JavaScript MIME type of "";. Strict MIME type checking is enforced for module scripts per HTML spec

1 answer