> runtime for TypeScript written in Go<p>This makes it sound like the TypeScript runtime (interpreter or JIT) is written in Go, but the project uses the quickjs JavaScript runtime, which is written in C:<p><a href="https://github.com/bellard/quickjs" rel="nofollow">https://github.com/bellard/quickjs</a>
Project appears to be semi-dead, and was early stages when it was alive.<p>Incidentally, Elsa is already the name of a C++ parser: <a href="https://scottmcpeak.com/elkhound/sources/elsa/" rel="nofollow">https://scottmcpeak.com/elkhound/sources/elsa/</a>