Issues related to WebAssembly projects
WebAssembly: Access to fetch at 'https://XXXX' from origin 'http://XXXX' has been blocked by CORS policy
This is a security restriction from the JavaScript fetch API, where the endpoint you're calling needs to provide CORS headers to work properly.
If you control the API, you'll need to use the features from your framework to enable CORS, and if you don't you'll need to ask the maintainers of the endpoint to enable CORS.
To test if CORS is really the issue, you can use CORS Anywhere to proxy the queries.
Build error Failed to generate AOT layout
When building for WebAssembly with AOT mode enabled, the following error may appear:
Failed to generate AOT layout (More details are available in diagnostics mode or using the MSBuild /bl switch)
To troubleshoot this error, you can change the text output log level:
- Go to Tools, Options, Projects and Solution, then Build and Run
- Set MSBuild project build output verbosity to Normal or Detailed
- Build your project again and take a look at the additional output next to the
Failed to generate AOT layouterror
You can get additional build troubleshooting information here.