index.html

<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8">
        <title>Easy Note</title>

        <link rel="stylesheet" href="css/site.css">
        <link rel="stylesheet" href="richtext.min.css">
        <script src="jquery.min.js"></script>
        <script src="jquery.richtext.min.js"></script>
    </head>
    <body>


        <div class="page-wrapper box-content">

            <textarea id="hidden-texterea" class="content" name="example"></textarea>

        </div>

        <script>
        $(document).ready(function() {
            $('.content').richText();
            var content = localStorage.myMarkdownHereEditor;//decodeURIComponent, encodeURIComponent
            //console.log(cookie);
            if(content) {
                $('div.richText-editor').html(decodeURIComponent(content));
            }
            $('div.richText-editor').keyup(function() {
                //console.log(this.innerHTML);
                localStorage.myMarkdownHereEditor = encodeURIComponent(this.innerHTML);
                //console.log(document.cookie);
            })
        });
        </script>

    </body>
</html>