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

libjs-openlayers is installed in your system.

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

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

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

libjs-openlayers package basic information: