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Prevent Multiple Form Submits


13th May 2021 3 mins read
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Hi, Let's see a quick way to prevent your customers or users from submitting forms multiple times with simple CSS & Javascript.


Step 1 - Your HTML Form


You might have a form for which the HTML might look similar to the following.

<form action="" method="post" class="form-prevent-multiple-submits">
    <div class="mt-2">   
        <textarea name="description" id="description" rows="3" class="form-control form-control-sm"></textarea>
    </div>
    <div class="mt-1">
        <button type="submit" class="btn btn-sm btn-primary button-prevent-multiple-submits">
            <i class="fas fa-spinner spinner"></i> Comment
        </button>
    </div>
</form>


It's just a form with a textarea and submit button which looks like the following. Observe the following classes in form & submit the button we will use to disable the submit button.

<form class="form-prevent-multiple-submits">

<button class="button-prevent-multiple-submits">
    <i class="fas fa-spinner spinner d-none"></i> Comment
</button>

Step 2 - Simple Animation To Rotate The Spinner In Button


multiple-form-submit-prevent.css

/** Hide spinner on page load */
.spinner{
    display: none;
}

/** Code to rotate the spinnner with keyframes */
.button-prevent-multiple-submits .spinner{
    -webkit-animation:spin 4s linear infinite;
    -moz-animation:spin 4s linear infinite;
    animation:spin 4s linear infinite;
}

@-moz-keyframes spin { 100% { -moz-transform: rotate(360deg); } }
@-webkit-keyframes spin { 100% { -webkit-transform: rotate(360deg); } }
@keyframes spin { 100% { -webkit-transform: rotate(360deg); transform:rotate(360deg); } }

Step 3 - Javascript To Disable The Button


multiple-form-submit-prevent.js

/** On submit of the form disable the submit button and display the spinner */
$('.form-prevent-multiple-submits').on('submit', function() {
    $('.button-prevent-multiple-submits').attr('disabled', true);
    $('.button-prevent-multiple-submits .spinner').show();
});

Complete Form Example


In the following code, I have used FontAwesome, Bootstrap 4, jQuery files. If you have only jQuery then the code is good to go.


<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Prevent Multiple Form Submit Example</title>

    <!-- Fontawesome -->
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.15.3/css/all.min.css" />
    <!-- Bootsgrap CSS file -->
    <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@4.5.3/dist/css/bootstrap.min.css">
    <!-- Link to your CSS file -->
    <link rel="stylesheet" href="multiple-form-submit-prevent.css">

    <!-- Bootstrap & jQuery file -->
    <script src="https://code.jquery.com/jquery-3.5.1.slim.min.js"></script>
    <script src="https://cdn.jsdelivr.net/npm/bootstrap@4.5.3/dist/js/bootstrap.bundle.min.js"></script>
    <!-- Link to your Javascript file -->
    <script src="multiple-form-submit-prevent.js"></script>
</head>
<body>
    <form action="" method="post" class="form-prevent-multiple-submits">
        <div class="mt-2">   
            <textarea name="description" id="description" rows="3" class="form-control form-control-sm"></textarea>
        </div>
        <div class="mt-1">
            <button type="submit" class="btn btn-sm btn-primary button-prevent-multiple-submits">
                <i class="fas fa-spinner spinner d-none"></i> Comment
            </button>
        </div>
    </form>
</body>
</html>





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AUTHOR

Channaveer Hakari

I am a full-stack developer working at WifiDabba India Pvt Ltd. I started this blog so that I can share my knowledge and enhance my skills with constant learning.

Never stop learning. If you stop learning, you stop growing