How Can JavaScript Prevent Form Resubmission on Page Refresh?

Preventing Form Resubmission on Page Refresh

When users submit a form, it's essential to prevent the data from being submitted again when the page is refreshed. This ensures data integrity and user experience.

One effective method is to utilize the JavaScript function window.history.replaceState(). This function updates the current history entry with a new URL and state object, allowing us to replace the current URL with itself. As a result, when the user refreshes the page, they stay on the same page instead of resubmitting the form.

Implementation:

Add the following JavaScript code to your page:

<script>
    if ( window.history.replaceState ) {
        window.history.replaceState( null, null, window.location.href );
    }
</script>

When the page loads, this script checks if the window.history.replaceState() function is supported by the browser. If it is, it updates the current history entry with the same URL, effectively preventing resubmission on refresh.

Note:

While this JavaScript approach can be effective, it's recommended to use a server-side approach such as Post/Redirect/Get (PRG) to ensure data integrity across all scenarios. However, this solution provides a novel alternative using JavaScript.

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