query parser

query.js

function query()  {
  location.search
      .substr(1)
      .split('&')
      .reduce(function (query, component) {
        component = component.length && component.split('=');
  
        if (component.length) {
            try {
                var key = decodeURIComponent(component[0]),
                    value = component[1];
    
                if (query[key]) {
                    query[key] = [].concat(query[key]);
                    query[key].push(decodeURIComponent(value))
                } else {
                    query[key] = value && decodeURIComponent(value);
                }
    
            } catch (exception) {
    
            }
        }
      return query;
  }, {});
}