Type Annotations! A guide to writing Luau code that is actually good

[TheLegendaryDragon99 (TLD99)]

Sometimes the never type is used for annotating unintended members of a table to be indexed.

For example, __index in a metatable.

Typechecking OOP code across scopes

Typechecking in Luau is incredibly powerful to communicate to yourself and other developers as to the relative intent of user data, which allows for faster development. Additionally, typechecking, when done correctly, can allow for powerful autofill. Object-oriented programming in Lua is a strange concept, since it’s an abstract approach to a programming language not otherwise built for OOP. However, the generally accepted method of creating classes looks something like this: local TestClass =…