► JavaScript allows the computer to be more secure by putting the privacy policies and disable the unauthorized access to the files.

► It allows many actions to be performed like, setting the browser's preferences and receiving the request from the servers for the client computer.

► The settings that are used gets saved on the client side on the features like actions buttons, appearance and printing.

► It allows easy launching of an application on the client computer with interactive data to be communicated between the server and the client.

► It allows reading and writing of files or directories on the client or server side.

► It allows easy capturing of the data that is live streamed from the server to the client machine for retransmission.

► It also allows to safe and secure the application from the outside world.