demo_publish_custommodule/index.js

This is simple node module, provide you functionality of calculating square and cube.

module.exports.MyCalc = function(){
    this.square = function(no){
        return no*no;
    },
    this.cube = function(no){
        return no*no*no;
    },
    this.mult = function(no1,no2){
        return no1*no2;
    }
}