Thanks @konstantyn_diachenko , got the clarity about container.js but do you have any idea on utils.js ?do you know why we should use this in the page?

Hi,adding file paths,Do we really need this files?/core/wcm/components/commons/site/clientlibs/container.js/core/wcm/components/commons/site/clientlibs/utils.js

We have 10 years old legacy site which has been developed by AEM on premise and as part of one requirement we are planning to move all the css and js files into CF but we are not sure about core component container.js and utils.js, Just want to know what those mentioned js files will do in the site ...