CodeDom.Compiler.CodeDomProvider.CreateProvider("JScript") does not return JavaScript provider

[radoslawbialek88]

Hi,
We are converting .Net4.8 tests to net6.0 and noticed following problem:
It is not possible to create javascript provider using:

System.CodeDom.Compiler.CodeDomProvider.CreateProvider("JScript");
Using "JS", "javascript", "jscript") does not work as well.

Error we get:
System.CodeDom.Compiler.CodeDomProvider+ConfigurationErrorsException
There is no CodeDom provider defined for the language.
at System.CodeDom.Compiler.CodeDomProvider.GetCompilerInfo(String language)
at System.CodeDom.Compiler.CodeDomProvider.CreateProvider(String language)

We can see that different version of System.CodeDom is used for Net48 and different for Net6:

There is no problem for Net48 and we can see after decompiling library that there is a method:

  this.AddCompilerInfo(new CompilerInfo(compilerParams3, codeDomProviderTypeName3)
  {
    _compilerLanguages = new string[3]
    {
      "js",
      "jscript",
      "javascript"
    },

but this is absent for version 6.0.0 and 7.0.0:
https://github.com/dotnet/runtime/blob/main/src/libraries/System.CodeDom/src/System/CodeDom/Compiler/CodeDomProvider.cs

According to: https://learn.microsoft.com/pl-pl/dotnet/api/system.codedom.compiler.codedomprovider?view=dotnet-plat-ext-7.0
This should work:
provider = CodeDomProvider.CreateProvider("JScript");

but it does not.
Can you please add provider for JavaScript?

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Issue Details

---

Hi,
We are converting .Net4.8 tests to net6.0 and noticed following problem:
It is not possible to create javascript provider using:

System.CodeDom.Compiler.CodeDomProvider.CreateProvider("JScript");
Using "JS", "javascript", "jscript") does not work as well.

Error we get:
System.CodeDom.Compiler.CodeDomProvider+ConfigurationErrorsException
There is no CodeDom provider defined for the language.
at System.CodeDom.Compiler.CodeDomProvider.GetCompilerInfo(String language)
at System.CodeDom.Compiler.CodeDomProvider.CreateProvider(String language)

We can see that different version of System.CodeDom is used for Net48 and different for Net6:

There is no problem for Net48 and we can see after decompiling library that there is a method:

  this.AddCompilerInfo(new CompilerInfo(compilerParams3, codeDomProviderTypeName3)
  {
    _compilerLanguages = new string[3]
    {
      "js",
      "jscript",
      "javascript"
    },

but this is absent for version 6.0.0 and 7.0.0:
https://github.com/dotnet/runtime/blob/main/src/libraries/System.CodeDom/src/System/CodeDom/Compiler/CodeDomProvider.cs

According to: https://learn.microsoft.com/pl-pl/dotnet/api/system.codedom.compiler.codedomprovider?view=dotnet-plat-ext-7.0
This should work:
provider = CodeDomProvider.CreateProvider("JScript");

but it does not.
Can you please add provider for JavaScript?

Author:	ReiperOne
Assignees:	-
Labels:	area-System.CodeDom
Milestone:	-

[stephentoub]

Can you please add provider for JavaScript?

There are no plans to support this with .NET Core. The CodeDOM JavaScript provider relied on JScript.NET, which is not available with .NET Core.

[radoslawbialek88]

Oh ok.. and there is no trick to overcome this at least?

Please update documentation so it does not show what is impossible :)
https://learn.microsoft.com/pl-pl/dotnet/api/system.codedom.compiler.codedomprovider?view=dotnet-plat-ext-7.0:?

Applies to

Product	Versions
1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
2.1, 2.2, 3.0, 3.1, 5, 6, 7

[stephentoub]

I agree it'd be good to update the docs to call out that only some of the providers are available. It's possible there's some other library that makes available a provider for JS, but there's definitely not one in .NET Core itself.

[uphugar]

I had the same issue. Used JInt - https://github.com/sebastienros/jint and it worked for my usecase.