在浏览器中使用Lua语言：Fengari

local js = require "js"
local window = js.global

local function sleep(delay)
    local co = assert(coroutine.running(), "Should be run in a coroutine")

    window:setTimeout(function()
        assert(coroutine.resume(co))
    end, delay*1000)

    coroutine.yield()
end

coroutine.wrap(function()
    print "Going to sleep now..."

    sleep(3)

    print "Sleep well?"
end)()

$ curl -L -O https://github.com/fengari-lua/fengari-web/releases/download/v0.1.4/fengari-web.js

<script src="fengari-web.js" type="text/javascript"></script>

<script type="application/lua">
print("hello world!")
</script>

<script src="/my-script.lua" type="application/lua" async></script>