"Submit is not a function" error in JavaScript

Make sure that there is no another form with the same name and make sure that there is no name="submit" or id="submit" in the form.

If you have no opportunity to change name="submit" you can also submit form this way:

function submitForm(form) {
    const submitFormFunction = Object.getPrototypeOf(form).submit;
    submitFormFunction.call(form);
}

<form action="product.php" method="post" name="frmProduct" id="frmProduct" enctype="multipart/form-data">

<input id="submit_value" type="button" name="submit_value" value="">

</form>

<script type="text/javascript">

document.getElementById("submit_value").onclick = submitAction;

function submitAction()
{
    document.getElementById("frmProduct").submit();
    return false;
}
</script>

EDIT: I accidentally swapped the id's around

form.submit() will not work if the form does not have a <button type="submit">submit</button>. form element belongs to HTMLFormElement interface, therefore, we can call from prototype directly, this method will always work for any form element.

HTMLFormElement.prototype.submit.call(form)

I had the same issue when i was creating a MVC application using with master pages. Tried looking for element with 'submit' as names as mentioned above but it wasn't the case.

For my case it created multiple tags on my page so there were some issues referencing the correct form.

To work around this i'll let the button handle which form object to use:

onclick="return SubmitForm(this.form)"

and with the js:

function SubmitForm(frm) {
    frm.submit();
}

This topic has a lot of answers already, but the one that worked best (and simplest - one line!) for me was a modification of the comment made by Neil E. Pearson from Apr 21 2013:

If you're stuck with your submit button being #submit, you can get around it by stealing another form instance's submit() method.

My modification to his method, and what worked for me:

document.createElement('form').submit.call(document.getElementById(frmProduct));

I had same issue and resolved my issue just remove name="submit" from submit button.

<button name='submit' value='Submit Payment' ></button>

Change To

<button value='Submit Payment' ></button>

remove name attribute hope it will work

I was facing the same problem that my submit() wasn't working. In my case, I'd an id="submit" on the input tag having type="submit", I removed the id, and it started working.

giving a form element a name of submit will simple shadow the submit property . make sure you don't have a form element with the name submit and you should be able to access the submit function just fine .

In fact, the solution is very easy...

Original:

    <form action="product.php" method="get" name="frmProduct" id="frmProduct"
enctype="multipart/form-data">
    <input onclick="submitAction()" id="submit_value" type="button" 
    name="submit_value" value="">
</form>
<script type="text/javascript">
    function submitAction()
    {
        document.frmProduct.submit();
    }
</script>

Solution:

    <form action="product.php" method="get" name="frmProduct" id="frmProduct" 
enctype="multipart/form-data">
</form>

<!-- Place the button here -->
<input onclick="submitAction()" id="submit_value" type="button" 
    name="submit_value" value="">

<script type="text/javascript">
    function submitAction()
    {
        document.frmProduct.submit();
    }
</script>

Sorry to answer late but for those who are still facing the same error. To get rid of this error:

<form method="POST">
  <input type="text"/>
  <input type="submit" id="submit-form" value="Submit Form" style="display: none;"/>
</form>

<!-- Other element that will submit the form -->
<button onclick="submitTheForm()">Submit the form</button>

<script>
function submitTheForm(){
  document.getElementById("submit-form").click();
}
</script>

Explanation:

The javascript function submitTheForm() is accessing the submit input element and calling the click event on it which results in the form submission.

This solution is lifetime and almost 100% compatible in all browsers.

Possible solutions -
1.Make sure that you don't have any other element with name/id as submit.
2.Try to call the function as onClick = "return submitAction();"
3.document.getElementById("form-name").submit();

You should use this code :

$(document).on("ready", function () {
       
        document.frmProduct.submit();
    });

What I used is

var enviar = document.getElementById("enviar");
enviar.type = "submit"; 

Just because everything else didn´t work.

Solution for me was to set the "form" attribute of button

<form id="form_id_name"><button name="btnSubmit" form="form_id_name" /></form>

or is js:

YOURFORMOBJ.getElementsByTagName("button")[0].setAttribute("form", "form_id_name");
YOURFORMOBJ.submit();

I faced this issues also but i made a quick fix using

const form = document.getElementById('create_user_form');

function onSubmit(event) {
  console.log(event.target[0].value);

  console.log(form.submit); // 👉️ input#submit

  // ✅ Works
  HTMLFormElement.prototype.submit.call(form);
}

form.addEventListener('submit', onSubmit);

Even though accessing the submit property on the form element points to the submit input element and not the method, we can still submit the form by accessing the submit property on the HTMLFormElement interface.

You can try

<form action="product.php" method="get" name="frmProduct" id="frmProduct" enctype="multipart/form-data">

<input onclick="submitAction(this)" id="submit_value" type="button" name="submit_value" value="">

</form>

<script type="text/javascript">
function submitAction(element)
{
    element.form.submit();
}
</script>

Don't you have more than one form with the same name ?

Use getElementById:

document.getElementById ('frmProduct').submit ()