$ sudo apt-get update
$ sudo apt-get install libkjsapi4 

libkjsapi4 is installed in your system.

Make ensure the libkjsapi4 package were installed using the commands given below,

$ sudo dpkg-query -l | grep libkjsapi4 *

You will get with libkjsapi4 package name, version, architecture and description in a table

libkjsapi4 package basic information: