Convert numbers between different bases, such as hexadecimal and decimal in JavaScript

convertbase.js

/**
* Convert From/To Binary/Decimal/Hexadecimal in JavaScript
* https://gist.github.com/shamshul2007/
* Copyright 2012-2015, Shamshul <shamshul2007@gmail.com>
* Licensed under The MIT License
* http://www.opensource.org/licenses/mit-license
*/

(function(){

    var ConvertBase = function (num) {
        return {
            from : function (baseFrom) {
                return {
                    to : function (baseTo) {
                        return parseInt(num, baseFrom).toString(baseTo);
                    }
                };
            }
        };
    };
        
    // binary to decimal
    ConvertBase.bin2dec = function (num) {
        return ConvertBase(num).from(2).to(10);
    };
    
    // binary to hexadecimal
    ConvertBase.bin2hex = function (num) {
        return ConvertBase(num).from(2).to(16);
    };
    
    // decimal to binary
    ConvertBase.dec2bin = function (num) {
        return ConvertBase(num).from(10).to(2);
    };
    
    // decimal to hexadecimal
    ConvertBase.dec2hex = function (num) {
        return ConvertBase(num).from(10).to(16);
    };
    
    // hexadecimal to binary
    ConvertBase.hex2bin = function (num) {
        return ConvertBase(num).from(16).to(2);
    };
    
    // hexadecimal to decimal
    ConvertBase.hex2dec = function (num) {
        return ConvertBase(num).from(16).to(10);
    };
    //Octal to Decimal
    ConvertBase.oct2dec = function (num) {
        return ConvertBase(num).from(8).to(10);
    };
    
     //Decimal to Octal
    ConvertBase.dec2oct = function (num) {
        return ConvertBase(num).from(10).to(8);
    };
    
    this.ConvertBase = ConvertBase;
    
})(this);

/*
* Usage example:
* ConvertBase.bin2dec('1111'); // '15'
* ConvertBase.dec2hex('82'); // '52'
* ConvertBase.hex2bin('e2'); // '11100010'
* ConvertBase.dec2bin('153'); // '10011001'
* ConvertBase.hex2dec('1FE4ED63D55FA51E'); //'2298222722903156000'
* ConvertBase.oct2dec('777'); //'511'
* ConvertBase.dec2oct('551'); //'1047'
*/