npm install querystring
################# OR ##############
npm install query-string

const querystring = require('querystring');

https://ittutorial.in/controller/method?name=sana
https://ittutorial.in/controller/method?name=sana&id=07
here name=sana is query string.

querystring.encode()

querystring.decode()

querystring.parse(str[, sep[, eq[, options]]])

querystring.stringify(obj[, sep[, eq[, options]]])

querystring.escape(str)

querystring.unescape(str)

Syntax :- querystring.parse( str[, sep[, eq[, options]]]) )

str :- str is the string field that specifies the query string that has to be parsed.

sep :- It is an optional string field, it specifies the substring used to key and value pairs in the query string. The default value which is generally used is "&"

eq :- The default value which is "="

option :- It is an optional object field which is used to modify the behaviour of the method.

var querystring = require('querystring');
var qry = querystring.parse('year=2020&month=may');
console.log(qry.year);

// Import the querystring module
const querystring = require("querystring");
// Specify the URL query string to be parsed
let urlQueryString = "name=mahtab&age=36&id=07&login=false";
// Use the parse() method on the string
let parsedObj = querystring.parse(urlQueryString);
console.log("Parsed Query 1:", parsedObj);
// Use the parse() method on the string with sep as `&&` and eq as `-`
urlQueryString = "name-sana&&age-2&&id-07&&login-true";
parsedObj = querystring.parse(urlQueryString, "&&", "-");
console.log("\nParsed Query 2:", parsedObj);
// Specify a new URL query string to be parsed
urlQueryString = "type=admin&articles=node&articles=javascript&access=true";
// Use the parse() method on the string with maxKeys set to 1
parsedObj = querystring.parse(urlQueryString, "&", "=", { maxKeys: 1 });
console.log("\nParsed Query 3:", parsedObj);
// Use the parse() method on the string with maxKeys set to 2
parsedObj = querystring.parse(urlQueryString, "&", "=", { maxKeys: 2 });
console.log("\nParsed Query 4:", parsedObj);
// Use the parse() method on the string with maxKeys set to 0 (no limits)
parsedObj = querystring.parse(urlQueryString, "&", "=", { maxKeys: 0 });
console.log("\nParsed Query 5:", parsedObj);

querystring. stringify( obj[, sep[, eq[, options]]]) )

querystring = require('querystring');
const qry = querystring.stringify({name:'sana',id:'07'});
console.log(qry);

// Import the querystring module
const querystring = require("querystring");
// Specify the object that needed to be serialized
let obj = {
name: "sana",
access: true,
role: ["developer", "admin", "manager"],
};
// Use the stringify() method on the object
let queryString = querystring.stringify(obj);
console.log("Query String 1:", queryString);

obj = {
name: "mahira",
access: false,
role: ["admin", "HR"],
};
// Use the stringify() method on the object with sep as `, ` and eq as `:`
queryString = querystring.stringify(obj, ", ", ":");
console.log("Query String 2:", queryString);

// Use the stringify() method on the object with sep as `&&&` and eq as `==`
queryString = querystring.stringify(obj, "&&&", "==");
console.log("\nQuery String 3:", queryString);