some new syntax in parser:
{! don't parse #}
{# js code with return #}
{## js code without return #}

new method:
game.parseJsFromFile(String pathName)
parse js file
Util.getExternalModJsFilesById
get js file, such as getExternalModFilesById

mod can write its js code, and call it.

add new parse syntax to fix the question js' [] be regarded as command
{! don't parse #}
{# parse as js with return #}
{## parse as js without return #}

mod's js' data can be saved, and can update check when mod's version update.