Remove assoc array from query string

Question

I like to remove an array variable conditions from a query string which will be window.location.search.

• First output Before is the initial string.
• Second is after removing sub
• Third still contains conditions.

How can I get rid of it?

edit The unencoded string is

conditions[0][0][field]=firstname&conditions[0][0][operator]=is&conditions[0][0][value]=John&conditions[1][0][field]=lastname&conditions[1][0][operator]=is&conditions[1][0][value]=Doe

which is needed for the application.

var string = '?page=foo&sub=bar&conditions%5B0%5D%5B0%5D%5Bfield%5D=firstname&conditions%5B0%5D%5B0%5D%5Boperator%5D=is&conditions%5B0%5D%5B0%5D%5Bvalue%5D=John&conditions%5B1%5D%5B0%5D%5Bfield%5D=lastname&conditions%5B1%5D%5B0%5D%5Boperator%5D=is&conditions%5B1%5D%5B0%5D%5Bvalue%5D=Doe';
var params = new URLSearchParams(string);

console.log('Before', params.toString());

params.delete('sub');

console.log('remove sub works', params.toString());

params.delete('conditions');

console.log('conditions still exist', params.toString());

Answer 1

Do you want this?

var string =
  "?page=foo&sub=bar&conditions%5B0%5D%5B0%5D%5Bfield%5D=firstname&conditions%5B0%5D%5B0%5D%5Boperator%5D=is&conditions%5B0%5D%5B0%5D%5Bvalue%5D=John&conditions%5B1%5D%5B0%5D%5Bfield%5D=lastname&conditions%5B1%5D%5B0%5D%5Boperator%5D=is&conditions%5B1%5D%5B0%5D%5Bvalue%5D=Doe";
const urlSearchParams = new URLSearchParams(string);

const params = Object.fromEntries(urlSearchParams.entries());

console.log({ params });

function getFilteredParams(params, filteredString) {
  let obj = {};
  for (const key in params) {
    if (key.indexOf(filteredString) == -1) {
      obj[key] = params[key];
    }
  }
  return obj;
}

console.log(getFilteredParams(params, "conditions"));