How did this guy do this?

Question

Apparently this account made a typescript code??? I tried copying it but it just turned to html, and the compiler doesn’t work… does someone know how he changed the language to something outside of the languages allowed?

https://sololearn.com/compiler-playground/cM31meiQI19k/?ref=app

Answer 1

go to sololearn.com
create script

Answer 2

Lisa but there is no typescript language on the website…