118

Im trying to submit a HTML form using AJAX using this example.

My HTML code:

<form id="formoid" action="studentFormInsert.php" title="" method="post">
    <div>
        <label class="title">First Name</label>
        <input type="text" id="name" name="name" >
    </div>
    <div>
        <label class="title">Name</label>
        <input type="text" id="name2" name="name2" >
    </div>
    <div>
        <input type="submit" id="submitButton"  name="submitButton" value="Submit">
    </div>
</form>

My script:

<script type="text/javascript">
    $(document).ready(function() { 
        $('#formoid').ajaxForm(function() { 
            alert("Thank you for your comment!"); 
        }); 
    });
</script>

This is not working, I'm not even getting the alert message and when I submit I don't want to redirect to another page, I just want to show the alert message.

Is there a simple way of doing it?

PS: I have several fields, I have just put two as an example.

1
  • can u not do away with the "form" html component? and use jquery to post on come button's click handler Commented Sep 19, 2018 at 7:21

3 Answers 3

201

Quick Description of AJAX

AJAX is simply Asyncronous JSON or XML (in most newer situations JSON). Because we are doing an ASYNC task we will likely be providing our users with a more enjoyable UI experience. In this specific case we are doing a FORM submission using AJAX.

Really quickly there are 4 general web actions GET, POST, PUT, and DELETE; these directly correspond with SELECT/Retreiving DATA, INSERTING DATA, UPDATING/UPSERTING DATA, and DELETING DATA. A default HTML/ASP.Net webform/PHP/Python or any other form action is to "submit" which is a POST action. Because of this the below will all describe doing a POST. Sometimes however with http you might want a different action and would likely want to utilitize .ajax.

My code specifically for you (described in code comments):

/* attach a submit handler to the form */
$("#formoid").submit(function(event) {

  /* stop form from submitting normally */
  event.preventDefault();

  /* get the action attribute from the <form action=""> element */
  var $form = $(this),
    url = $form.attr('action');

  /* Send the data using post with element id name and name2*/
  var posting = $.post(url, {
    name: $('#name').val(),
    name2: $('#name2').val()
  });

  /* Alerts the results */
  posting.done(function(data) {
    $('#result').text('success');
  });
  posting.fail(function() {
    $('#result').text('failed');
  });
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>

<form id="formoid" action="studentFormInsert.php" title="" method="post">
  <div>
    <label class="title">First Name</label>
    <input type="text" id="name" name="name">
  </div>
  <div>
    <label class="title">Last Name</label>
    <input type="text" id="name2" name="name2">
  </div>
  <div>
    <input type="submit" id="submitButton" name="submitButton" value="Submit">
  </div>
</form>

<div id="result"></div>


Documentation

From jQuery website $.post documentation.

Example: Send form data using ajax requests

$.post("test.php", $("#testform").serialize());

Example: Post a form using ajax and put results in a div

<!DOCTYPE html>
<html>
    <head>
        <script src="http://code.jquery.com/jquery-1.9.1.js"></script>
    </head>
    <body>
        <form action="/" id="searchForm">
            <input type="text" name="s" placeholder="Search..." />
            <input type="submit" value="Search" />
        </form>
        <!-- the result of the search will be rendered inside this div -->
        <div id="result"></div>
        <script>
            /* attach a submit handler to the form */
            $("#searchForm").submit(function(event) {

                /* stop form from submitting normally */
                event.preventDefault();

                /* get some values from elements on the page: */
                var $form = $(this),
                    term = $form.find('input[name="s"]').val(),
                    url = $form.attr('action');

                /* Send the data using post */
                var posting = $.post(url, {
                    s: term
                });

                /* Put the results in a div */
                posting.done(function(data) {
                    var content = $(data).find('#content');
                    $("#result").empty().append(content);
                });
            });
        </script>
    </body>
</html>

Important Note

Without using OAuth or at minimum HTTPS (TLS/SSL) please don't use this method for secure data (credit card numbers, SSN, anything that is PCI, HIPAA, or login related)

Sign up to request clarification or add additional context in comments.

8 Comments

@abc123 how can I set Authorization request header in this ? I tried beforeSend: function (xhr) { xhr.setRequestHeader("Authorization", "*****"); xhr.setRequestHeader("contentType", "application/json;charset=UTF-8"); }, But this does not set any header
@mahendrakawde you would need to utilize $.ajax which I can write an example of if you'd like but that is really a separate question
@abc123 i do have thread initiated for that. let me share it with you.
can we avoid using form post at all and simply do jquery post on a button's (which is an html button not part of any form div) click handler. This way event.preventdefault wont be needed either?
@harshvchawla of course, but then your select query for the variables pulled from the html element is different
|
31
var postData = "text";
      $.ajax({
            type: "post",
            url: "url",
            data: postData,
            contentType: "application/x-www-form-urlencoded",
            success: function(responseData, textStatus, jqXHR) {
                alert("data saved")
            },
            error: function(jqXHR, textStatus, errorThrown) {
                console.log(errorThrown);
            }
        })

6 Comments

success/complete function will happen when the call is completed and it receives a 200 OK from the server
hi i put: $(document).ready(function () { $('#formoid').submit(function () { var postData = "text"; $.ajax({ type: "post", url: "url", data: postData, contentType: "studentFormInsert.php", success: function(responseData, textStatus, jqXHR) { alert("data saved") }, error: function(jqXHR, textStatus, errorThrown) { console.log(errorThrown); } }) }); its not working actually.. any modification on php side is needed?
good example and well written, please post some answer with it though not just example code with no explanation.
I don't get how to connect that with the form I wish to post
Why is there no explanation?
|
4

Note that $('FORM').serialize() is easy to use, but will NOT WORK for FILE INPUTS / uploads!

This will work:

<form id="myform">
   <input type="file" name="somefile">
   <button type="submit">Submit</button>
</script>

// jquery.form.min.js
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery.form/4.3.0/jquery.form.min.js">

<script>
// register form for ajax
$('#myform').ajaxForm(function(submit_response) {
    console.log(submit_response);
});
</script>

Comments

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