Often times, users like to press a few times on the submit button to make sure the button is surely clicked, and causing the double form submission issue. The common solution is disables the submit button after user clicked on it.

1. Enable / Disable submit button

1.1 To disable a submit button, you just need to add a disabled attribute to the submit button.


$("#btnSubmit").attr("disabled", true);

1.2 To enable a disabled button, set the disabled attribute to false, or remove the disabled attribute.


$('#btnSubmit').attr("disabled", false);	
or
$('#btnSubmit').removeAttr("disabled");

2. jQuery full example


<!DOCTYPE html>
<html lang="en">

<body>
<h1>jQuery - How to disabled submit button after clicked</h1>

<form id="formABC" action="#" method="POST">
    <input type="submit" id="btnSubmit" value="Submit"></input>
</form>

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>

<input type="button" value="i am normal abc" id="btnTest"></input>

<script>
    $(document).ready(function () {

        $("#formABC").submit(function (e) {

            //stop submitting the form to see the disabled button effect
            e.preventDefault();

            //disable the submit button
            $("#btnSubmit").attr("disabled", true);

            //disable a normal button
            $("#btnTest").attr("disabled", true);

            return true;

        });
    });
</script>

</body>
</html>

References

  1. jQuery Submit API