error TS6054: File 'DifferentNamesSpecified/b.js' has unsupported extension. The only supported extensions are '.ts', '.tsx', '.d.ts'.


!!! error TS6054: File 'DifferentNamesSpecified/b.js' has unsupported extension. The only supported extensions are '.ts', '.tsx', '.d.ts'.
==== DifferentNamesSpecified/tsconfig.json (0 errors) ====
    {
      "compilerOptions": { "out": "test.js" },
      "files": [ "a.ts", "b.js" ]
    }
==== DifferentNamesSpecified/a.ts (0 errors) ====
    var test = 10;