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How to AJAX Submit a Form in jQuery

Topic: JavaScript / jQueryPrev|Next

Answer: Use the jQuery $.post() Method

You can simply use the $.post() method in combination with the serialize() method to submit a form using AJAX in jQuery. The serialize() method creates a URL encoded text string by serializing form values for submission. Only "successful controls" are serialized to the string.

Let's try out the following example to understand how it basically work:

  • <!DOCTYPE html>
  • <html lang="en">
  • <head>
  • <meta charset="utf-8">
  • <title>jQuery AJAX Submit Form</title>
  • <script src="https://code.jquery.com/jquery-1.12.4.min.js"></script>
  • <script>
  • $(document).ready(function(){
  •     $("form").on("submit", function(event){
  •         event.preventDefault();
  •  
  •         var formValues= $(this).serialize();
  •  
  •         $.post("process_form.php", formValues, function(data){
  •             // Display the returned data in browser
  •             $("#result").html(data);
  •         });
  •     });
  • });
  • </script>
  • </head>
  • <body>
  •     <form>
  •         <p>
  •             <label>Name:</label>
  •             <input type="text" name="name">
  •         </p>
  •         <p>
  •             <label>Gender:</label>
  •             <label><input type="radio" value="male" name="gender"> Male</label>
  •             <label><input type="radio" value="female" name="gender"> Female</label>
  •         </p>
  •         <p>
  •             <label>Hobbies:</label>
  •             <label><input type="checkbox" value="music" name="hobbies[]"> Music</label>
  •             <label><input type="checkbox" value="sports" name="hobbies[]"> Sports</label>
  •             <label><input type="checkbox" value="dance" name="hobbies[]"> Dance</label>
  •         </p>
  •         <p>
  •             <label>Favorite Color:</label>
  •             <select name="color">
  •                 <option>Red</option>
  •                 <option>Green</option>
  •                 <option>Blue</option>
  •             </select>
  •         </p>
  •         <p>
  •             <label>Comment:</label>
  •             <textarea name="comment"></textarea>
  •         </p>
  •         <input type="submit" value="submit">
  •     </form>
  •     <div id="result"></div>
  • </body>
  • </html>

Here is the PHP script of our "process_form.php" file, which simply retrieve and output form elements values submitted by the user, which eventually sent back to the user's browser.

  • <h2>Here is the information submitted by you:</h2>
  • <p>Name: <b><?php echo $_POST["name"] ?? ''; ?></b></p>
  • <p>gender: <b><?php echo $_POST["gender"] ?? ''; ?></b></p>
  • <p>Favorite Color: <b><?php echo $_POST["color"] ?? ''; ?></b></p>
  • <p>Hobbies: <b><?php if(isset($_POST["hobbies"])){ echo implode(", ", $_POST["hobbies"]); } ?></b></p>
  • <p>Comment: <b><?php echo $_POST["comment"] ?? ''; ?></b></p>

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