JSFiddle - React, Tailwind, and code Playground

HTML

<div>
    <input type="checkbox" id="box1" checked="checked" />Rose Tyler
    <br />
    <input type="checkbox" id="box1" />Martha Jones
    <br />
    <input type="checkbox" id="box1" checked="checked" />Amy Pond
    <br />
    <input type="checkbox" id="box1" checked="checked" />Sarah Jane Smith
    <br />
    <input type="checkbox" id="box1" />Donna Noble
    <br />
    <input type="checkbox" id="box1" checked="checked" />Clara Oswald
    <br /> <a href="javascript:void(0);" id="state-checker">Check State</a>

</div>

JavaScript

$.fn.IsOriginalState = function () {
    var data = $(this).prop("stateData");
    if (data == null || data == undefined) {
        data = {
            OriginalState: $(this).prop("checked"),
            CurrentState: $(this).prop("checked")
        }
        $(this).prop("stateData", data);
        data = $(this).prop("stateData");
    }
    return data.OriginalState == data.CurrentState;
};

$(document).ready(function () {

    $(document).bind("check-changed", function (e) {
        var originalCount = 0;
        $("input[type='checkbox']").each(function () {
            if ($(this).IsOriginalState()) {
                originalCount++;
            }
        });
        var isOriginal = originalCount == $("input[type='checkbox']").length;
        if (isOriginal) {
            alert("Checkboxes are in their original state.");
        } // end if
    });

    $("input[type='checkbox']").each(function () {
        $(this).IsOriginalState(); //Set the initial values
    });
    $("input[type='checkbox']").change(function (data) {
        $(this).prop("stateData").CurrentState = $(this).prop("checked");
        $(document).trigger("check-changed");
    });

    $("#state-checker").click(function () {
        var originalCount = 0;
        $("input[type='checkbox']").each(function () {
            if ($(this).IsOriginalState()) {
                originalCount++;
            }
        });
        var isOriginal = originalCount == $("input[type='checkbox']").length;
        alert(isOriginal);
    });
});