So Teal is to Lua as TypeScript is to JavaScript. Which means it automatically plays well with any Lua environment. Unlike luau and nelua which are also statically typed but have their own runtimes.
What version of Lua does it use? Lua gets new versions every few years so I don't know why so many impls don't continuously upgrade to the latest version.
It's got an awesome C API. It's fast, lightweight, and embeddable. It's more performant than Python. It's a staple in video game scripting.
Semantically, Lua is almost identical to the core of JavaScript. Metatables are a genius alternative to prototype chains.
Lua's syntax is beautifully simple and unambiguous, but at the cost of being moderately inconvenient in 2025 unfortunately. It could benefit from an ESNext-style renewal.
I get why they made the C API that way, but in practice it's very easy to get wrong.
I'm not sure how fast vanilla Lua is today compared to similar languages. I think LuaJIT (and Luau?) are most often used when performance is needed.
Like another commenter said, using . instead of : is maybe the most common mistake, too easy to make. And Lua offers no help preventing or checking it.
TypeScript is a great language. So is Lua. So is C.
When used carefully to avoid their warts. Learning how to do that for any language takes time and practice though.
- tables being used for both objects and arrays can create a lot of confusion, especially when you have some integer keys, but not all, and especially when they are not consecutive or one of them is 0 - indexes start at 1 - assigning nil deinitializes variables/entries instead of assigning the value `nil` (this becomes especially bad if you mistakingly try to use nil as a value in an array/table) - nil and false are falsy, but not 0, which instead is truthy
But, equivalently, of course I'm going to criticize a hammer if it's literally covered in warts making it difficult to grasp without slipping. (or, if the gun I'm trying to use keeps firing bullets into my foot when I'm aiming down range.)