node.js hot reload of js files. (it is not restart, more like erlang) hotreload.path hotreload.watch(script, reload_callback) watch script file, onchange load the script file and call callback script is string reload_callback(newmodule) is a function, it has an argument - the loaded module object. hotreload.watch(watchpath, script , reload_callback) watch one file and load another. watchpath can b