Unable to exclude JSON files from being copied to the output directory with `blazorwasm` template

Issue Description

So there’s a project that combines Blazor and some NPM scripts, therefore there’s two NPM files (package.json and package-lock.json) in the source code folder. The problem is - these files are getting copied over to the build directory, and whatever I do to exclude them - nothing helps. These files shouldn’t be in the output directory, since they’re only to be used by developers. The problem reproduces with clean project created from blazorwasm template, but doesn’t reproduce for the console one.

I’ve tried these two ways to exclude it, but unsuccessfully:

.csproj file

<ItemGroup>
    <None Include="package.json" />
</ItemGroup>

<ItemGroup>
    <ExcludeFromPackageFiles Include="package.json" />
</ItemGroup>

it looks like any .json file despite being unused is somehow copied to the bin directory.

I’m curious if this is a bug, and if not how it can be switched off.

Steps to Reproduce

1. Create a new project with dotnet new blazorwasm
2. Create a new empty .json file in the root of the repo, for example: package.json
3. Run dotnet build and notice that the file was copied to bin/Debug/net6.0

Versions & Configurations

• dotnet version 6.0.300
• OS: Debian GNU/Linux bookworm/sid
• Kernel: Linux 5.17.0-1-amd64

[arsinclair]

Is it a deliberate choice to copy all .json files from src/ directory to the output folder? I would imagine that an opt-in approach (include what’s needed) is safer here than opt-out (exclude what’s not needed) just because most people wouldn’t know about it, unless they check the output.

[mediabuff]

Content Remove works, but for tsconfig.json, removing the config file, breaks the typescript compiler - as it is unable to find the config file. The following seems to be a better solution:

<Content Update="package*.json" CopyToOutputDirectory="Never"/>
<Content Update="libman.json" CopyToOutputDirectory="Never"/>
<Content Update="tsconfig.json" CopyToOutputDirectory="Never"/>