JSFiddle - React, Tailwind, and code Playground

HTML

<!DOCTYPE html>
<html>
<head>
  <style>div { color:red; }</style>
  <script src="http://code.jquery.com/jquery-latest.min.js"></script>
</head>
<body>
  <form><input type="checkbox" /></form>

  <div></div>
<script>

    var isFormParentA = $("input").parent().is("form"),
        isFormParentB = $("input").parent().is(function () {
            return 'form';
        });
    console.log("isFormParentA = " + isFormParentA )    
    console.log("isFormParentB = " + isFormParentB )    
</script>

</body>
</html>