index.html

<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="utf-8" />
        <title></title>
    </head>
    <body>
        <div class="test-selector"></div>
        <div id="testId"></div>

        <script src="js/debug/dollar-bill.js?v=.1"></script>
        <script src="js/debug/dollar-bill-css.js?v=.1"></script>

        <script>

            var testSelector = document.querySelector(".test-selector"),
                testId = document.getElementById("testId"),
                $ts = $(".test-selector"),
                $tid = $("#testId"),
                $ts2 = $(testSelector),
                $tid2 = $(testId);
            
            testSelector.innerText = $ts.length;
            testId.innerText = $tid.length;

            console.info($ts.hasClass("test-selector"));
            
        </script>

    </body>
</html>