tsconfig why do I see compileOptions at so many places instead of compilerOptions

Question

I am migrating a project from javascript to typescript and was reading several blogs to understand how could I go about doing that. I wonder why do so many blogs use compileOptions instead of compilerOptions. On the official guide/docs I only find the later. My guess is older versions of typescript expected compileOptions and it was later renamed, however I am unable to find any source to confirm that from any source/docs.