Include Blazor assets only when building nodejs

Author: javiercn

src/Components/Directory.Build.targets

@@ -1,11 +1,11 @@
 <Project>
-  <PropertyGroup Condition="'$(UsingMicrosoftNETSdkBlazorWebAssembly)' == 'true'">
+  <PropertyGroup Condition="'$(UsingMicrosoftNETSdkBlazorWebAssembly)' == 'true' and '$(BuildNodeJS)' == 'true'">
     <BlazorWebAssemblyJSPath
         Condition=" '$(Configuration)' == 'Debug' ">$(RepoRoot)src\Components\Web.JS\dist\Debug\blazor.webassembly.js</BlazorWebAssemblyJSPath>
     <BlazorWebAssemblyJSPath
         Condition=" '$(Configuration)' != 'Debug' ">$(RepoRoot)src\Components\Web.JS\dist\Release\blazor.webassembly.js</BlazorWebAssemblyJSPath>
     <BlazorWebAssemblyJSMapPath>$(BlazorWebAssemblyJSPath).map</BlazorWebAssemblyJSMapPath>
   </PropertyGroup>
-  
+
   <Import Project="$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildThisFileDirectory)..\, Directory.Build.targets))\Directory.Build.targets" />
 </Project>