$ sudo apt-get update
$ sudo apt-get install libqtscript4-webkit 

libqtscript4-webkit is installed in your system.

Make ensure the libqtscript4-webkit package were installed using the commands given below,

$ sudo dpkg-query -l | grep libqtscript4-webkit *

You will get with libqtscript4-webkit package name, version, architecture and description in a table

libqtscript4-webkit package basic information: