If file concatenation has been enabled on the server, the contents of
jquery.js will be inserted into the
You can make use of a tool available from http://yui.github.io/yuicompressor/ for this. There is also Grunt or Gulp that you can use to automate both file concatenation and CSS minifying. Both of these are task runners. They allow you to automate your web development. Both are very well-supported and have plenty of documentation as well.