worldometer Covid-19 additions of mortality and highlighting of European nations

worldometer-covid19.js

// ==UserScript==
// @name         COVID-19 Mortality Meter
// @namespace    http://tampermonkey.net/
// @version      1.1
// @description  try to take over the world!
// @author       You
// @match        https://www.worldometers.info/coronavirus/
// @grant        none
// @require      https://code.jquery.com/jquery-3.4.1.min.js#sha256-CSXorXvZcTkaix6Yvo6HppcZGetbYMGWSFlBw8HfCJo=
// ==/UserScript==

jQuery(function() {
    'use strict';

	let tablesList = ['#main_table_countries_today', '#main_table_countries_yesterday'];
	let europeanCountries = ['albania', 'andorra', 'austria', 'belarus', 'belgium', 'bosnia and herzegovina', 'bulgaria', 'channel islands', 'croatia', 'cyprus', 'czechia', 'denmark', 'estonia', 'faeroe islands', 'finland', 'france', 'germany', 'gibraltar', 'greece', 'hungary', 'iceland', 'ireland', 'isle of man', 'italy', 'latvia', 'liechtenstein', 'lithuania', 'luxembourg', 'malta', 'moldova', 'monaco', 'netherlands', 'north macedonia', 'norway', 'poland', 'portugal', 'romania', 'san marino', 'serbia', 'slovakia', 'slovenia', 'spain', 'sweden', 'switzerland', 'uk', 'ukraine'];

	for (var i = 0; i < tablesList.length; i++) {
		if (!$(tablesList[i]).length) {
			continue;
		}

		//Add in mortality column.
		$(tablesList[i] + ' thead tr th').eq(4).after('<th class="sorting" tabindex="0" rowspan="1" colspan="1" style="width: 78px;" width="30">Morality<br>Rate</th>');
		$(tablesList[i] + ' thead tr th').eq(8).after('<th class="sorting" tabindex="0" rowspan="1" colspan="1" style="width: 78px;" width="30">Population</th>');

		let countryName, totalCases, totalDeaths, totalCasesPerMillion, mortalityRate, population, countryCount, $countryTable;

		//Countries
		$countryTable = $(tablesList[i] + ' tbody:eq(0) tr');
		countryCount = $countryTable.length - 1;

		$countryTable.each(function(i) {
			countryName =          $(this).find('td:eq(0)').text();
			totalCases =           Number.parseFloat($(this).find('td:eq(1)').text().replace(/,/g, ''), 10);
			totalDeaths =          Number.parseFloat($(this).find('td:eq(3)').text().replace(/,/g, '') | '0', 10);
			totalCasesPerMillion = Number.parseFloat(($(this).find('td:eq(8)').text() || '0').replace(/,/g, ''), 10);
			mortalityRate =        ((100 / totalCases) * totalDeaths).toFixed(2);
			population =           (Math.round(Number.parseFloat((totalCases / totalCasesPerMillion) * 1000000, 10) / 1000000) * 1000000).toLocaleString('en');

			if (europeanCountries.includes(countryName.toLowerCase())) {
				$(this).attr('style','background-color:#67E2E85C; color:#000;');
			}

			if (!$(this).find('td:eq(0) a').length) {
				$(this).find('td:eq(0)').html('<a class="mt_a" href="country/' + countryName.toLowerCase() + '/">' + countryName + '</a>');
			}

			$(this).find('td:eq(0)').prepend(i + ': ');
			$(this).find('td:eq(4)').after('<td style="font-weight: bold; text-align:right">' + mortalityRate + '%</td>');
			$(this).find('td:eq(8)').after('<td style="font-weight: bold; text-align:right">' + population + '</td>');
		});

		//World
		$(tablesList[i] + ' tbody:eq(1) tr').each(function() {
			totalCases =           Number.parseFloat($(this).find('td:eq(1)').text().replace(/,/g, ''), 10);
			totalDeaths =          Number.parseFloat($(this).find('td:eq(3)').text().replace(/,/g, '') | '0', 10);
			totalCasesPerMillion = Number.parseFloat(($(this).find('td:eq(8)').text() || '0').replace(/,/g, ''), 10);
			mortalityRate =        ((100 / totalCases) * totalDeaths).toFixed(2);
			population =           (Math.round(Number.parseFloat((totalCases / totalCasesPerMillion) * 1000000, 10) / 1000000) * 1000000).toLocaleString('en');

			$(this).find('td:eq(0)').html('<strong>' + countryCount + ' Nations</strong>');
			$(this).find('td:eq(4)').after('<td style="font-weight: bold; text-align:right">' + mortalityRate + '%</td>');
			$(this).attr('style','background-color:#B594FF; color:#000;');
			$(this).find('td:eq(8)').after('<td style="font-weight: bold; text-align:right">' + population + '</td>');
		});

		$(tablesList[i] + ' tbody:eq(0) tr:eq(0)').before($(tablesList[i] + ' tbody:eq(1) tr').parent().clone().html());
		$(tablesList[i] + ' tbody:eq(0) tr:eq(1)').remove();
	}

}($.noConflict()));

thanks for that nice user script in these unpleasant days ...
small issue ... the population totals are not working (for me)

Hi @smadep, I've updated the script based on my current version.

Population is (totalCases / totalCasesPerMillion) * 1000000) so the number can vary considerably each day. It's not required but is useful as a guide, and shouldn't be considered accurate.