getAllUrlParams.js

getAllUrlParams.js

/**
 * getAllUrlParams( @url );
 * url: https://www.sitepoint.com/get-url-parameters-with-javascript/
 */

function getAllUrlParams(url) {
  var queryString = url ? url.split('?')[1] : window.location.search.slice(1);
  var obj = {};

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

    for (var i=0; i<arr.length; i++) {
      var a = arr[i].split('=');
      var paramNum = undefined;
      var paramName = a[0].replace(/\[\d*\]/, function(v) {
        paramNum = v.slice(1,-1);
        return '';
      });

      var paramValue = typeof(a[1])==='undefined' ? true : a[1];
      paramName = paramName.toLowerCase();
      paramValue = paramValue.toLowerCase();

      if (obj[paramName]) {
        if (typeof obj[paramName] === 'string') {
          obj[paramName] = [obj[paramName]];
        }
        if (typeof paramNum === 'undefined') {
          obj[paramName].push(paramValue);
        } else {
          obj[paramName][paramNum] = paramValue;
        }
      }
      else {
        obj[paramName] = paramValue;
      }
    }
  }

  return obj;
}

// USE:
// getAllUrlParams('http://example.com/?product=shirt&color=blue&newuser&size=m').product
// => 'shirt'