Adds slight tweaks to GoG.com for better UI

gog-site-adjustment.user.js

// ==UserScript==
// @name	Add GOG Site Adjustments
// @namespace	https://gist.github.com/NZDev0/
// @author	Dev0 NZ
// @description	Items currently added: Button for sorting wishlists by price
// @updateURL	https://gist.github.com/NZDev0/b5ad52cb35435625dd814cd18de9c0f7/raw/
// @downloadURL	https://gist.github.com/NZDev0/b5ad52cb35435625dd814cd18de9c0f7/raw/
// @match	https://www.gog.com/*
// @run-at	document-end
// @version	1.3
// ==/UserScript==

(function() {
	//let ascendingOrder = true;
	let sort_btn = document.createElement("button");

	sort_btn.innerHTML = "Sort By Price";
	sort_btn.addEventListener("click", () => {
				let elems = document.querySelectorAll('.list-inner');
		elems = elems[elems.length-1];
		let prices = Array.prototype.slice.call(document.querySelectorAll('.product-row-wrapper'),0);
		prices.sort(function(a,b){
			if(elems.classList.contains('sorted')){
				return parseFloat(b.querySelector('._price.product-state__price').textContent) - parseFloat(a.querySelector('._price.product-state__price').textContent);
			}
			return parseFloat(a.querySelector('._price.product-state__price').textContent) - parseFloat(b.querySelector('._price.product-state__price').textContent);
				});
		elems.innerHTML = '';
		elems.classList.contains('sorted') ? elems.classList.remove('sorted') : elems.classList.add('sorted');
		for(let i = 0; i<prices.length; i++){
			elems.appendChild(prices[i]);
		}
			/*let listInner = document.querySelectorAll('.list-inner')[1]; 
		let productRows = Array.from(listInner.querySelectorAll('.product-row-wrapper'));

		productRows.sort((a, b) => {
		    const priceA = parseFloat(a.querySelector('._price.product-state__price').textContent);
		    const priceB = parseFloat(b.querySelector('._price.product-state__price').textContent);

		    return ascendingOrder ? priceA - priceB : priceB - priceA;
		});

		ascendingOrder = !ascendingOrder;

		productRows.forEach(productRow => listInner.appendChild(productRow));*/
	});
	
	// Add wishlist sort button
	if(/wishlist/.test(document.location.href)){
		// Timeout added for it to be able to work in conjuction with Barefoot Essentials/Adalia Fundamentals scripts
		/*
		 * https://greasyfork.org/de/scripts/1758-barefoot-essentials
		 * https://gist.github.com/adaliabooks/bf3cbdbb56db6c107dd8
		 *
		 */
		 
		setTimeout(()=>{
			let el;
			if(/Wishlisted by/.test(document.querySelector(".header__main").innerHTML)){
				el = document.querySelector(".collection-header");
			}else{
				el = document.querySelectorAll(".header__main");
				el = el[el.length-1];
			}
			el.appendChild(sort_btn);
		}, 900);
	}
})();