In typescript-to-lua 1.37.1 targeting Lua 5.3 or 5.4, bitwise &, |, ^, and ~ emit raw Lua 64-bit integer operators without ToInt32 conversion. Values outside the signed 32-bit range are not wrapped to 32-bit signed integers, and non-integral floats throw a runtime error instead of truncating toward zero (breaking x | 0).

console.log(0x80000000 | 0);
console.log(4294967297 | 0);
console.log(-1 & 0xffffffff);
console.log(~0xffffffff);
console.log(0x80000000 ^ 0);
console.log(1.5 | 0);

Node prints -2147483648, 1, -1, 0, -2147483648, and 1, as required by ECMA-262 (ToInt32 on operands and signed 32-bit results).

When transpiled with luaTarget: "5.4" (or "5.3"), Lua prints 64-bit results and then fails on 1.5 | 0:

2147483648
4294967297
4294967295
-4294967296
2147483648
lua: main.lua:7: number has no integer representation

Credit: https://ucsbplse.github.io/