how to apply the next and previous buttons in the javascript code example

Example: next and previous buttons in javascript

Shure. Reading the documentation you just have to create your buttons and with jquery do the trick

http://www.listjs.com/docs/list-api

    var i = 1;
            $('.next').on('click', function(){
                i++;
                listObj.show(i, 3); 
            })

            $('.prev').on('click', function(){
                i--;
                listObj.show(i, 3); 
            })
Let me know if it works