function nestQueryString(queryString) {

const params = {};

const paramArray = queryString.startsWith('?') ? queryString.slice(1).split('&') : queryString.split('&');

for (const param of paramArray) {

const [key, value] = param.split('=');

if (key) {

const keyParts = key.split('.'); // Split by '.' to create nested structure

let currentLevel = params;

for (let i = 0; i < keyParts.length - 1; i++) {

const part = keyParts[i];

if (!currentLevel[part]) {

currentLevel[part] = {}; // Create nested object if it doesn't exist

}

currentLevel = currentLevel[part];

}

currentLevel[keyParts[keyParts.length - 1]] = value ? value : true; // Assign value to the final level

}

}

return params;

}

// Example usage:

// const queryString = "param1=value1&param2.param3=value3&param2.param4=value4&param5=value5";

// const nestedParams = nestQueryString(queryString);

// console.log(nestedParams);