WASM runtime in the .NET 8 enables EH and SIMD instructions by default.

[pavelsavara]

WASM runtime in the .NET 8 enables EH and SIMD instructions by default.

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Document Details

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• ID: fa3e99ba-cbe1-e8a1-6628-9b6eb39710a4
• Version Independent ID: dd777362-b92d-cac6-2343-a7aaf31d0bdf
• Content: Tooling for ASP.NET Core Blazor
• Content Source: aspnetcore/blazor/tooling.md
• Product: aspnet-core
• Technology: aspnetcore-blazor
• GitHub Login: @guardrex
• Microsoft Alias: riande

[guardrex]

@pavelsavara ... I think this is a duplicate of #28996, which was resolved by #28997.

The live content is at ...

https://learn.microsoft.com/en-us/aspnet/core/blazor/tooling?view=aspnetcore-8.0&pivots=windows#net-webassembly-build-tools

btw ... to track .NET 8 Blazor doc work, I have an issue every year that shows where I'm at with everything ...

#28161

I'll close as completed, but let me know if more work needs to be done.

[guardrex]

For ...

.NET 8 enables EH and SIMD instructions by default.

... we might need to update it after all. It currently tells devs that ...

To enable WebAssembly exception handling, use the property in the app's project file (.csproj) with a value of true:

... and shows the MS Build config.

Should that be removed for >=8.0?

[guardrex]

Yes, I think that's right. Also, since it's enabled by the default the guidance should be showing how to disable it for >=8.0, so I'll change that section and ping u on the PR. Currently, it only states in the text that it's enabled by default.

I'll fix it now and ping u on the PR.

[pavelsavara]

You may need to switch it off, for example when you are targeting old/mobile devices.
Here are details on how https://github.com/dotnet/runtime/blob/main/src/mono/wasm/features.md#simd---single-instruction-multiple-data

[pavelsavara]

And note it's broken right now dotnet/runtime#89302