member_group_size_calc.js

import $ from "jquery";

$(window).ready(
    () => {
        $("#member-count").on(
            "keypress",
            event => {
                if (event.key === "Enter") {
                    $("#calculate").click();
                }
            }
        )
        $("#calculate").on(
            "click",
            event => {
                const memberCount = Number($("#member-count").val());

                if (isNaN(memberCount) || memberCount === 0) {
                    alert("Prosím, zadej skutečný počet členů.");
                    return;
                }

                const hundredth = Math.ceil(memberCount / 100);
                const fifth = Math.ceil(memberCount / 5);
                const twoSquareRoots = Math.ceil(2 * Math.sqrt(memberCount));

                $("#hundredth").html(hundredth);
                $("#tenth").html(Math.ceil(memberCount / 10));
                $("#fifth").html(fifth);
                $("#two-square-roots").html(twoSquareRoots);

                const motionStart = Math.max(
                    Math.min(fifth, twoSquareRoots), hundredth
                );
                const motion = Math.ceil(motionStart / 2);

                $("#member-motion,#ongoing-motion").html(motion);
                $("#motion-start").html(motionStart);
            }
        );
    }
)