Steam Account history export (run in browser dev tools - https://store.steampowered.com/account/history/)

script.js

rows = document.querySelectorAll("tr")
final = []
console.log(rows.length)
rows.forEach(element => {
	onclick = element.attributes["onclick"];
	if (onclick == null) { return; }
	onclick_value = onclick.nodeValue;
	startId = onclick_value.indexOf("transid=")
	if (startId == -1) { return; }
	transid = onclick_value.substr(startId + "transid=".length)
	if (transid.slice(-1) == "'") {
		transid = transid.substr(0, transid.length - 1);
	}

	license = { id: transid }
	license.date = (function () {
		dateText = element.querySelector(".wht_date").innerText;
		parsedDate = new Date(dateText);
		return !isNaN(parsedDate) ? parsedDate : dateText;
	}());
	license.cost = element.querySelector(".wht_total").innerText;
	license.type = element.querySelector(".wht_type div").innerText;
	license.items = (function () {
		gameList = element.querySelectorAll(".wht_items div");
		return [...gameList].map(gameDom => { return gameDom.innerText });
	}());
	//
	final.push(license);
});
console.log(final);