bbo/set_url_param.js

bbo is a utility library of zero dependencies for javascript.

'use strict';

/**
 * setUrlParam
 * From https://stackoverflow.com/questions/5999118/add-or-update-query-string-parameter
 */
var setUrlParam = function (key, value) {
  var uri = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : window.location.href;
  var re = new RegExp('([?&])' + key + '=.*?(&|$)', 'i');
  var separator = uri.indexOf('?') !== -1 ? '&' : '?';

  if (uri.match(re)) {
    return uri.replace(re, '$1' + key + '=' + value + '$2');
  } else {
    return uri + separator + key + '=' + value;
  }
};

module.exports = setUrlParam;