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jQuery to Count and limit number of words in Asp.Net textbox or HTML textarea

Introduction: In this article I am going to share how to count the number of words being entered and limit the words  to desired number while typing in asp.net textbox, multiline textbox, HTML input or textarea field using jQuery without any plugin. 

jQuery to Count and limit the words in Asp.Net textbox or HTML textarea


 Implementation: Let’s create a demo example for demonstration purpose.

HTML Source Code

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
    <script type="text/javascript">
        $(function () {
            var maxWords = 10;
            var wordCounts = {};
            $(".txt").keyup(function () {
                var matches = this.value.match(/\b/g);
                wordCounts[this.id] = matches ? matches.length / 2 : 0;
                var totalCount = 0;
                $.each(wordCounts, function (k, v) {
                    totalCount += v;
                });

                if (totalCount > maxWords) {
                    $(".txt").val(this.value.slice(0, -2));
                    totalCount = totalCount - 1;
                }
                $('#lblWordCount').text('Total Words: ' + totalCount);
            }).keyup();
        });
    </script>
</head>
<body>
    <form id="form1" runat="server">
        <div>
            <asp:TextBox ID="txtComment" CssClass="txt" runat="server" TextMode="MultiLine"
                Rows="4" Columns="50" onselectstart="return false" onpaste="return false;"
                onCopy="return false" onCut="return false" onDrag="return false" onDrop="return false" autocomplete="off"></asp:TextBox>
            <br />
            <label id="lblWordCount"></label>
        </div>
    </form>
</body>
</html>


Note: I have added the attributes   onselectstart="return false" onpaste="return false;" onCopy="return false" onCut="return false" onDrag="return false" onDrop="return false" autocomplete="off" to the textbox to prevent cut, copy, paste, text drag and drop, text selections, and the auto complete feature. So users has to manually type in the textbox and the jQuery script will count the words entered and limit it to specified 10 words.

Now over to you:
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