trumpetto parse your html.
npm install script-injector
Just pipe a stream of html through script-injector. You can pass in either some stringified code or a function object. What could be easier?
scriptInjector = require'script-injector';// Then do something like this somewhere elsefscreateReadStream'anHTMLFile'pipescriptInjectoraFunctionpipesomeOtherPlace;
script-injector will insert the provided code before your first script tags, or just before
</body> if you don't have any other scripts.