Parsing a URL (2019-edition)

example.js

const encodedDestHref = encodeURIComponent('https://example.com/#/hash/path?hparam1=a&hparam2=b');
location.href = `https://example.com/path?dest=${encodedDestHref}`;

const searchParams = new URLSearchParams(location.search);
const destHref = searchParams.get('dest');
const destUrl = new URL(destHref);
const hashRelativeUrl = new URL(destUrl.hash.substr(1), destUrl.origin); //hack

console.log(hashRelativeUrl.pathname); // '/hash/path'
console.log(hashRelativeUrl.search); // '?hparam1=a&hparam2=b'
console.log(hashRelativeUrl.searchParams.get('hparam2')); // 'b'