Can't Figure out $.post jQuery with PHP

I need the form.php code to run without refreshing the page. I'd like to use $.post. Here is my HTML code:

<!DOCTYPE html>
<html lang="en-US">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>HTML Contact Form</title>
<script src="https://code.jquery.com/jquery-3.6.0.min.js" integrity="sha256-/xUj+3OJU5yExlq6GSYGSHk7tPXikynS7ogEvDej/m4=" crossorigin="anonymous"></script>
<script src="form.js"></script>
<link rel="stylesheet" href="style.css" type="text/css">
</head>
<body>
<div class="form">
    <form method="POST" action="form.php" id="foo" name="foo">
        <h1>Contact Form</h1>
        <table>
            <tr>
                <td>
                    <label for="fname">Full Name:</label><br>
                    <input type="text" name="fname" placeholder="John Doe" id="">
                </td>
            </tr>
            <tr>
                <td>
                    <label for="email">Your Email:</label><br>
                    <input type="email" name="email" placeholder="example@gmail.com" id="">
                </td>
            </tr>
            <tr>
                <td>
                    <label for="msg">Your Message:</label><br>
                    <textarea name="msg" placeholder="Type your message..." id="" cols="30" rows="10"></textarea>
                </td>
            </tr>
            <tr>
                <td>
                    <input type="submit" name="submit" value="Send Message">
                </td>
            </tr>
        </table>
    </form>
</div>
<p id="target">
</p>
<script>
$(document).ready(function() {

$("#foo").submit(function(event){
        // Stop form from submitting normally
        event.preventDefault();
        
        /* Serialize the submitted form control values to be sent to the web server with the request */
        var formValues = $(this).serialize();
        
        // Send the form data using post
        $.post("form.php", formValues);

    $('#target').load('show.php');
});
});

</script>
</body>
</html>

Here is form.php

<?php
error_reporting(E_ALL);
log_errors(1);
display_errors(1);
    if(isset($_POST['submit']))
    {
        $name = $_POST['fname'];
        $email = $_POST['email'];
        $message = $_POST['msg'];
        
        //database details. You have created these details in the third step. Use your own.
        $host = "localhost";
        $username = "user";
        $password = "secret";
        $dbname = "form_entriesdb";

        //create connection
mysqli_report(MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);
        $con = mysqli_connect($host, $username, $password, $dbname);
        //check connection if it is working or not
        if (!$con)
        {
            die("Connection failed!" . mysqli_connect_error());
        }
        //This below line is a code to Send form entries to database
        $sql = $con->prepare("INSERT INTO contactform_entries (name_fld, email_fld, msg_fld) VALUES (?, ?, ?)");
$sql->bind_param("sss", $name, $email, $message);
$sql->execute();

    
      //connection closed.
$sql->close();
 $con->close();

Sorry for the lorem ipsum. I need to add it to post. "Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.

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