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                <!DOCTYPE html>
<html lang="pl">

    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">

    <script src="App.js"></script>





                // ZADANIE 1 ///////////////

const rockPaperScissors = function (player1, player2) {
    const possibilities = ['papier', 'kamień', 'nożyce'];
    const players = [player1.toLowerCase(), player2.toLowerCase()]; //wielkość liter w argumentach teraz nie ma znaczenia
    let result;

    for (const player of players) {
        if (!possibilities.includes(player)) return alert('Któryś z wyborów jest niepoprawny');

    //comparing results
    if (players[0] === players[1]) result = 'Remis';

    else if ((players[0] === 'papier' && players[1] === 'kamień') || (players[0] === 'kamień' && players[1] === 'nożyce') || (players[0] === 'nożyce' && players[1] === 'papier')) {
        result = 'Gracz 1 wygrywa';
    else result = 'Gracz 2 wygrywa';

    return console.log(result);

// ZADANIE 2 //////////////////

const returnBiggestNumber = function (...numbers) {

    if (arguments.length < 2) return alert('Musisz podać co najmniej 2 liczby');
    let numbersArray = [...arguments];

    for (const number of numbersArray) {
        if (typeof number !== 'number' || !isFinite(number)) return `Wartość "${number}" jest niewłaściwa`;

    //sortowanie liczb od najmniejszej do największej
    numbersArray = numbersArray.sort((a, b) => a - b);
    return console.log(`Największa liczba to ${numbersArray[numbersArray.length - 1]}`);

// ZADANIE 3 ///////////////

const findVowels = word => {
    if (typeof word !== 'string') return alert(`${word} nie jest ciągiem tekstowym`);
    const vowelsList = ['a', 'ą', 'e', 'ę', 'i', 'o', 'ó', 'u', 'y'];
    let vowelsCounter = 0;

    for (const letter of word.toLowerCase()) {
        if (vowelsList.includes(letter)) {
    return console.log(`Liczba spółgłosek w słowie/zdaniu "${word}" to ${vowelsCounter}`);

rockPaperScissors('noŻYCe', 'kamień');
returnBiggestNumber(33, 12, 5, 1082, 52, 3.4445);
findVowels('Javascript jest fajny');