@hilemangroup/bp-frontend/src/js/modules/getUrlParams.js

Common shared frontend utilities for boilerplate projects

/*!
 * getUrlParams.js
 * https://www.sitepoint.com/get-url-parameters-with-javascript/
 */

function getUrlParams(url) {
  var queryString = (url) ?
    url.split('?')[1] :
    window.location.search.slice(1);
  var result = {};
  var params, param, paramNum, paramName, paramValue;
  var i;

  if (queryString) {
    queryString = queryString.split('#')[0];
    params = queryString.split('&');

    for (i = 0; i < params.length; i++) {
      // separate the keys and the values
      param = params[i].split('=');

      // in case params look like: list[]=thing1&list[]=thing2
      paramNum = undefined;
      paramName = param[0].replace(/\[\d*\]/, function (v) {
        paramNum = v.slice(1, -1);
        return '';
      });
      paramValue = (typeof param[1] === 'undefined')
        ? true
        : decodeURIComponent(param[1]);

      paramName = paramName.toLowerCase();
      // paramValue = paramValue.toLowerCase();

      // if parameter name already exists
      if (result[paramName]) {
        if (typeof result[paramName] === 'string') {
          // convert value to array (if still string)
          result[paramName] = [result[paramName]];
        }
        if (typeof paramNum === 'undefined') {
          // if no array index number specified...
          // put the value on the end of the array
          result[paramName].push(paramValue);
        } else {
          // if array index number specified...
          // put the value at that index number
          result[paramName][paramNum] = paramValue;
        }
      } else {
        // if param name doesn't exist yet, set it
        result[paramName] = paramValue;
      }
    }
  }

  return result;
}

export default getUrlParams;