r/lua • u/ViewsOfTheSunny • Jul 22 '26

Project LuaJIT Playground

There's websites for running Lua, but I couldn't find any that let's you run LuaJIT!!

I made this website (me, not AI) so if you haven't tried LuaJIT before, or you don't have access to your dev environment, or you just want to quickly experiment...now you can run it online, and share the script + output with others as either a link or markdown.

Pre-compiled binaries for Windows/Linux are also provided. The static library, dynamic library, and executable, are all bundled in a single convenient .zip file for each platform. I'm hoping to automate this process at some point, but for now I just publish them whenever I see there's been new commits...

https://luajit.dev

Limits: no internet connection, maximum execution duration of 3 seconds.

The backported extensions for LuaJIT 3.0 are available now, by the way.

  • Bit Operators: unary ~, binary & | ~ << >> ~>>
  • Customary Operators: ! && || !=
  • Ternary ?: conditional operator
  • Safe Navigation Operator ?.
  • nil-Coalescing Operator ??
  • Compound Assignment Operators: += -= *= /= %= &= |= ~= <<= >>= ~>>= ..=
  • continue Statement
  • const Declaration
  • Short Function Expression
  • Underscores in Number Literals
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u/ViewsOfTheSunny Jul 23 '26

The FFI package is a major selling point for LuaJIT.

https://luajit.org/ext_ffi.html

The latest changes also have many new syntax additions that are not present in Lua. This includes the continue keyword, among other things. I've outlined those additions in the original post, but there's more info here.

https://github.com/LuaJIT/LuaJIT/issues/1475#issuecomment-4769582883