Open your command-line tool and go to the sample folder created to test the Closure Compiler.

Type the following command in order to concatenate the JavaScript files and to run the UglifyJS2 compressor. For Windows, you can use the copy command to concatenate the files:

C:\ copy /a *.js index.js

$ cat test.js index.js

$ uglifyjs --inline-script -o mytest.min.js

Open the generated file and take a look at the source code; you will get the following JavaScript:

var test=function(){var main=function(){alert(“executing manin”);internal()};var internal=function(){alert(“executing internal”)};return{init:main}}();var test=test.init();

Insert the script tag in the HTML page and open it in a browser.