I should be able to post a link to a TypeScript playground like

https://www.typescriptlang.org/play/?ssl=44&ssc=1&pln=8&pc=1#code/C4TwDgpgBASg9gdwCIENgqgXlhAxnAJwBMAeAZ2AIEsA7AcwBooBXGgaxsRoD4oAyKAG8oVIgC4oFavSgBfANwAoRaEhQAwnAA2zALY1U6EgBV4yNBggAPYBBpEysRIZRNjAaQggo12-cdsXnAAZlCmzha82IKKUHFQgSASHl6x8QR2RBAELhIAFABuKDoQyWYuANopIAC6AJRYvFK0dEqyysGsuMBUcDRQYARwuBBkZMYoAEZaECblFj42mY7z6G6e3r7LCUGh4ebo3HlDCBIAggQEKCBzEYdM+Dr655fXJJpPBha3B65hG9xuA0Yop2spBsNRuMpjM8mk4hUYvFkSJxFAAEQARgATABmdEMeEolASTGElHxSYSJEUlFWUnk2nIpJQbFE5HtDk1JiI9nxRISdEoAl8uIZezZXJQQrFZgQBqYXg0plxAD0qulYBQV10EFsBAaRRKEhoekm2SgAB8hKKUeq6SazdklCr4vbmY7dOaCC7XVB7Zy-RlgMwCP0AAYAEkERrlsnDvopgbiskZcWVKIFGMmIqZ4qyOQs+Vj8saNttyPteS1Or12UNstKUFNXot1ozTPd8XpzadPorbo1Ht7rf7fv9GuTKvVAAUhpACKAoAByKzLqBEOCjZtwYCLKgUKB9KCqaDLlveq1CKA9i-OqAsu8+uTLgB0A7FetDEejJdfVlTX9G1fEB40TFEp1TRR6iUZRlCAA

And it display the codeblock, and ideally also display the errors!