$ sudo apt-get update
$ sudo apt-get install libjs-jcrop 

libjs-jcrop is installed in your system.

Make ensure the libjs-jcrop package were installed using the commands given below,

$ sudo dpkg-query -l | grep libjs-jcrop *

You will get with libjs-jcrop package name, version, architecture and description in a table

libjs-jcrop package basic information: