Compressing or decompressing JavaScript

JavaScript is widely used in websites. While developing the JavaScript code, we use whitespaces, comments, and tabs for readability and maintenance of the code. This increases the file size, which slows page loading. Hence, most professional websites use compressed JavaScript speed page loading. This compression (also known as minified JS) is accomplished by removing the whitespace and newline characters. Once JavaScript is compressed, it can be decompressed by replacing enough whitespace and newline characters to make it readable. This recipe produces similar functionality in the shell.

Getting ready

We are going to write a JavaScript compressor tool as well as a decompressing tool. Consider the following JavaScript:

$ cat sample.js
    function sign_out()
    { 

       $("#loading").show(); 
       $.get("log_in",{logout:"True"},

       function(){ 
         window.location="";
       }); 
     }

Our script needs to perform these steps to compress...