URL Query To Object

url-query-to-object.js

function queryToObject(query) {
  if (query === '') { return {}; }
  let params = query.split('&');
  // console.log(params);
  let output = {};
  params.forEach(param => {
    const keys = param.split('=')[0].split('.');
    // console.log('keys:', keys);
    keys.forEach((key, index, array) => {
      const currentItem = function() {
        let itm = output;
        for (let i = 0; i < index; i++) {
          itm = itm[array[i]];
        }
        return (index === 0) ? output : itm;
      };
      // console.log('currentItem:', currentItem());
      if (currentItem().hasOwnProperty(key)) {
        // console.log('has');
      } else {
        // console.log('does not have');
        let itm = output;
        for (let i = 0; i < index; i++) {
          itm = itm[array[i]];
        }
        itm[key] = (index < array.length - 1) ? {} : decodeURIComponent(param.split('=')[1]);
      }
    });
  });
  return output;
}

// TEST
let query = 'a.a=zi&a.b=ziii&c=ENT%20TEST';
let testResult = {
  'a': {
      'a': 'zi',
      'b': 'ziii'
   },
  'c': 'ENT TEST'
};
const res = queryToObject(query);
if (res = testResult) {
  console.log('success');
  console.log('queryToObject(query) result:', res, ' <equals> testResult:', testResult);
} else {
  console.log('fails');
  console.log('queryToObject(query) result:', res, ' <not equals> testResult:', testResult);
}

URLQueryToObject.markdown

URL Query To Object

Function queryToObject converts url query to object.

Query: a.a=1&a.b=2&c=3

Object: { a { a: 1, b: 2 }, c: 3 }

A script by V.

License.