fengari-pass-array.js

global.WEB = false
const interop = require('fengari-interop')
const fengari = require('fengari')

const lua = fengari.lua
const lauxlib = fengari.lauxlib
const lualib   = fengari.lualib

const luacode = `
  print ('Lua: start')
  js = require "js"

  function printobject(o)
    for k, v in pairs(o) do
      print(k, v)
    end
  end

  function foo(this, x)
    printobject(x)
    print(type(x))
    print(#x)
  end

  js.global.foo = foo
`
const L = lauxlib.luaL_newstate()

/* open standard libraries */
lualib.luaL_openlibs(L)
lauxlib.luaL_requiref(L, lua.to_luastring("js"), interop.luaopen_js, 1)
lua.lua_pop(L, 1) /* remove lib */

const ok = lauxlib.luaL_dostring(L, lua.to_luastring(luacode))
if (ok) return console.log(`Error dostring: ${ok} ${lua.lua_tojsstring(L, -1)}`)

global.foo([14, 88])

Lua: start
0       14.0
1       88.0
userdata
/home/whatever/node_modules/fengari/src/lauxlib.js:135
    throw new Error(`PANIC: unprotected error in call to Lua API (${lua.lua_tojsstring(L, -1)})`);
    ^