Set query parameter to a all website url using javascript

window.onload = function () {
	function getCookieValue(name) {
		const cookies = document.cookie.split('; ');
		for (const cookie of cookies) {
			const [cookieName, cookieValue] = cookie.split('=');
			if (cookieName === name) {
				return cookieValue;
			}
		}
		return null;
	}


	const existingCookie = getCookieValue('bbQueryPSet');

	if (existingCookie) {
		// The cookie already exists, so update it with new values
		const urlSearchParams = new URLSearchParams(window.location.search);
		const paramsObject = Object.fromEntries(urlSearchParams.entries());
		const cookieValue = JSON.stringify(paramsObject);
		document.cookie = `bbQueryPSet=${cookieValue}`;
	} else {
		// The cookie does not exist, so create it
		const urlSearchParams = new URLSearchParams(window.location.search);
		const paramsObject = Object.fromEntries(urlSearchParams.entries());
		const cookieValue = JSON.stringify(paramsObject);
		document.cookie = `bbQueryPSet=${cookieValue}`;
	}


	const bbQueryPSetValue = getCookieValue('bbQueryPSet');
	if (bbQueryPSetValue) {
		const params = JSON.parse(bbQueryPSetValue);
		const urls = document.getElementsByTagName("a");

		for (let i = 0; i < urls.length; i++) {
			try {
				const url = new URL(urls[i].href);
				for (const [key, value] of Object.entries(params)) {
					url.searchParams.append(key, value);
				}
				urls[i].href = url.toString();
			} catch (error) {
				console.error(`Invalid URL: ${urls[i].href}`);
			}
		}
	}
}