node-nums

npm install node-nums

var nums = require('node-nums');

Change base of number:

    var tenInBaseThree = nums.changeBase(10, 3);
    //Returns string '101'

Get binary representation of a number:

var binaryReprOfTen = nums.getBinary(10);
    //Returns binary string '0101'

Get decimal representation of number in non-decimal base:

//The inital base is given as a second parameter
var tenInBaseThree = nums.changeBase(10, 3),
    backToDec = nums.getDecimal(tenInBaseThree);
    //Returns a number in base ten