With these single global function packed in small footprint js library file, you can make your multi pages html process more efficient. In traditional way, we have to rewrite/includes all headers (styles and script block) all over again in every html page in our project.The only to way to connect all those html page are through a href or using framework with SPA based concept. Using this single library now we can link all those html page in a modular way, which means we only require headers (styles and script block) only once, will be able to place our html+javascript module file to specific target element in our main file,and also the best part is we do not need any frontend framework to achieve that.