jQuery – Add options to select box dynamically


In this post, you will learn how to add (append) options to an existing select box (dropdown) dynamically using jQuery.

Let’s see the script

<!DOCTYPE html>
        <title>jQuery Script - Add options to select box dynamically</title>
        <meta charset="UTF-8">
        <meta name="viewport" content="width=device-width, initial-scale=1.0">
        <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>
            $(function () {
                $('#addopt').click(function () {
                    var newopt = $('#newopt').val();
                    if (newopt == '') {
                        alert('Please enter something!');

                    //check if the option value is already in the select box
                    $('#opt option').each(function (index) {
                        if ($(this).val() == newopt) {
                            alert('Duplicate option, Please enter new!');

                    //add the new option to the select box
                    $('#opt').append('<option value=' + newopt + '>' + newopt + '</option>');

                    //select the new option (particular value)
                    $('#opt option[value="' + newopt + '"]').prop('selected', true);
        <h3>jQuery Script - Add options to select box dynamically - <a href="">Tutorial is here</a></h3>
        <p>New Option: <input type="text" id="newopt" /> <input type="button" value="Add New" id="addopt" /></p>

            <select id="opt">
                <option value="Select">Select</option>
                <option value="One">One</option>
                <option value="Two">Two</option>


What do think about the above script? Easy right?

The above script not only teaching you how to add a new option to an existing dropdown but also teaches you.

  1. How to check for existing values in the select box
  2. How to select the particular value in the select box

You can see the demo for the above script here:





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