"Submit is not a function" error in JavaScript – Dev

The best answers to the question “"Submit is not a function" error in JavaScript” in the category Dev.

QUESTION:

Can anyone tell me what is going wrong with this code? I tried to submit a form with JavaScript, but an error “.submit is not a function” shown. See below for more details of the code:

<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>

I also tried this:

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

Both show me the same error 🙁

ANSWER:

<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

ANSWER:

submit is not a function

means that you named your submit button or some other element submit. Rename the button to btnSubmit and your call will magically work.

When you name the button submit, you override the submit() function on the form.

ANSWER:

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.

ANSWER:

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);
}