sample.js

'use strict';

var UrlAdapter = require('./UrlAdapter'),
  url = new UrlAdapter('https://www.domain.com/data?param1=1&param2=2&param3=3&param4=4&paramN=N');

url.leaveParams(['param1', 'param3', 'paramN']);
console.log(url.toString());

url = new UrlAdapter('?param1=1&param2=2&param3=3&param4=4&paramN=N');
url.removeParams(['param1', 'param2', 'param6']); //
console.log(url.toString());

UrlAdapter.js

'use strict';
var urlLib = require('url');

function UrlAdapter(urlString) {
  this.urlObj = urlLib.parse(urlString, true);
  // XXX remove the search property to force format() to use the query object when transforming the url object to a string
  delete this.urlObj.search;
}

UrlAdapter.prototype.parse = urlLib.parse;

UrlAdapter.prototype.hasQueryString = function () {
  return !!this.urlObj.query;
};

UrlAdapter.prototype.removeParam = function (param) {
  if (this.hasQueryString()) {
    delete this.urlObj.query[param];
  }
  return this;
};
UrlAdapter.prototype.setParam = function (param, value) {
  if (!this.hasQueryString()) {
    this.urlObj.query = {};
  }
  this.urlObj.query[param] = value;
  return this;
};

UrlAdapter.prototype.removeParams = function (params) {
  for (var i = 0; i < params.length; i++) {
    this.removeParam(params[i]);
  }
  return this;
};

UrlAdapter.prototype.leaveParams = function(params){
  var toRemove = Object.keys(this.urlObj.query).
    filter( function (paramName) {
      return params.indexOf(paramName) === -1;
    });

  return this.removeParams(toRemove);
};

UrlAdapter.prototype.toString = function () {
  return urlLib.format(this.urlObj);
};

module.exports = UrlAdapter;