This kind of code are because of the js is in the min form. min form of a js means that it is converted to minimum code as much as possible by shortenning the name of the variables and trimming spaces, removing comments, etc...
There are a number of reasons why compressing your javascript files is a good idea:
- Quicker download times for your users.
- Reduced bandwidth consumption of your website.
- Reduced number of HTTP requests on your server when combining many javascript files into one compressed file, thus reducing the server load and allowing more visitors to access your website.
- Comments and whitespace are not needed for javascript execution; Removing them will speed up script execution times.