js url query

const params = new URLSearchParams(window.location.search);
const id = params.get('id');

function getQueryParam(name) {
    const regex = new RegExp('[?&]' + name + '=([^&#]*)', 'i');
    const match = window.location.search.match(regex);
    return match ? decodeURIComponent(match[1]) : null;
}

const params = new URLSearchParams();
params.append('id', 123);
params.append('name', 'John');
const queryString = params.toString(); // "id=123&name=John"

const id = 123;
const name = 'John';
const queryString = `?id=${encodeURIComponent(id)}&name=${encodeURIComponent(name)}`;

const qs = require('qs');
const queryString = '?id[]=1&id[]=2&name=John';
const params = qs.parse(queryString.slice(1)); // { id: [1, 2], name: 'John' }