js files are deleted and I can't connect either the slider or what to do?

Question

JavaScript

Guys, please tell me how the libraries are connected if it costs gulpif ??? in production, I remove them all. And what is better to connect in order for js files to be transferred to production and how to connect also jQuery libraries, etc.? And if I connect the slider through owl .carusel then how should the browser sync be configured so that it correctly shows everything?

Answer 1

see package,json