javascript - Ruby on Rails - how require is executed in application.js

Ruby on Rails - how require is executed in application.js: I am reading a book for "Ruby on Rails". In the "appl...

I am reading a book for "Ruby on Rails". In the "application.js", we are including other JavaScript libraries in the following way and more specific - jQuery UI: //= require jquery //= require jquery_ujs //= require jquery-ui As this is ordinary JavaScript file (not ruby extensions here like "html.erb" for exmaple) how the application knows to execute the require command? What kind of JavaScript syntax is this: //= and as this is ordinary JavaScript file, why we are not using "script" tags to include JavaScript files? Also, I have read here that "require" method will check for this library in define by $LOAD_PATH variable folders. How can I see where the "jquery-ui" is stored? I am asking because in other applications in order to use jQuery UI I should add not only JavaScript file, but css file and images used by the library - in this case, we are doing this only with sing...

Full article: http://stackoverflow.com/questions/13218006/ruby-on-rails...