AshleyScirra opened a new issue #1142: URL: https://github.com/apache/cordova-android/issues/1142
# Bug Report ## Problem Recently we've been migrating our code to JavaScript Modules. However we've found on some devices, JavaScript Modules fail to load in Cordova. ### What is expected to happen? Install and open the app. On some devices, it fails to get past the splash screen. ### What does actually happen? On some devices, it works. On others, it fails. The problem appears to be the following console error message: > 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. The app includes a module script as: <script src="scripts/main.js" type="module"></script> It appears the strict MIME type checker for modules is failing to identify the MIME type for the given script. However the script is loaded from a file: protocol in Cordova. Therefore it is not possible to configure a Content-Type HTTP header. ## Information Presumably the WebView is not being told that the local .js file has the MIME type "application/javascript", and instead gets an empty string, which appears in the error message. Perhaps cordova-android can be updated to fix this. ### Command or Code Demo APK: https://www.dropbox.com/s/2payb5y2lpcdkro/testOOO.android.debug.apk?dl=0 Cordova project: https://www.dropbox.com/s/zudv2ooa83gzv4u/testOOO.zip?dl=0 ### Environment, Platform, Device From my test of four devices I got the following results: Google Pixel 3 / Android 11: Pass Google Nexus 9 / Android 7.1.1: Fail Samsung Galaxy S8 / Android 8: Fail HTC 10 / Android 8: Fail I don't know it works on some devices and fails on others, but it makes it a nasty gotcha for development. ### Version information Built with Cordova CLI and [email protected]. ## Checklist - [x] I searched for existing GitHub issues - [x] I updated all Cordova tooling to most recent version - [x] I included all the necessary information above ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
