Character Counter using JavaScript

Category > JAVASCRIPT || Published on : Wednesday, October 7, 2020 || Views: 180 || Character Counter using JavaScript


Here Pawan Kumar will explain how to Character Counter using JavaScript

<!DOCTYPE>
<html>
<head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <title>Live Demo - Character Counter using JavaScript</title>
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
    <script>
        function countChars(obj) {
            document.getElementById("charNum").innerHTML = obj.value.length + ' characters';
        }

        function countChars2(obj) {
            var maxLength = 20;
            var strLength = obj.value.length;

            if (strLength > maxLength) {
                document.getElementById("charNum2").innerHTML = '<span style="color: red;">' + strLength + ' out of ' + maxLength + ' characters</span>';
            } else {
                document.getElementById("charNum2").innerHTML = strLength + ' out of ' + maxLength + ' characters';
            }
        }
        function countChars3(obj) {
            var maxLength = 20;
            var strLength = obj.value.length;
            var charRemain = (maxLength - strLength);

            if (charRemain < 0) {
                document.getElementById("charNum3").innerHTML = '<span style="color: red;">You have exceeded the limit of ' + maxLength + ' characters</span>';
            } else {
                document.getElementById("charNum3").innerHTML = charRemain + ' characters remaining';
            }
        }
    </script>
</head>
<body>
    <h1>Live Character Counter using JavaScript</h1>
    <div class="container">
        <div class="row">
            <div class="col-lg-12">
                <div class="div-center">
                    <h4>Live Characters Count</h4>
                    <p><textarea name="message" onkeyup="countChars(this);"></textarea></p>
                    <p id="charNum">0 characters</p>

                    <h4>Live Characters Count with Max Length</h4>
                    <p><textarea name="message" onkeyup="countChars2(this);"></textarea></p>
                    <p id="charNum2">0 characters</p>

                    <h4>Remaining Characters Count</h4>
                    <p><textarea name="message" onkeyup="countChars3(this);"></textarea></p>
                    <p id="charNum3">25 characters remaining</p>
                </div>
            </div>
        </div>
    </div>
    <script src="//ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
</body>
</html>