> For the complete documentation index, see [llms.txt](https://docs.allthingsghl.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.allthingsghl.com/misc/editor-2.md).

# Auto Apply Coupon

```javascript
<script>
document.addEventListener('DOMContentLoaded', function() {
    // Function to get URL parameters
    function getQueryParam(param) {
        var params = new URLSearchParams(window.location.search);
        return params.get(param);
    }

    // Extract the coupon code from the URL
    var couponCode = getQueryParam('coupon_code');

    // If there's a coupon code, fill the input and setup a periodic check for the button's enabled state
    if (couponCode) {
        // Find the input box and button
        var inputBox = document.querySelector('input[name="coupon_code"]');
        var applyButton = document.querySelector('button.apply-btn.apply-coupon-btn');

        // Fill the input box with the coupon code
        inputBox.value = couponCode;

        // Function to check if the button is enabled and click it
        var attemptApplyCoupon = function() {
            if (!applyButton.disabled) { // Check if the button is enabled
                applyButton.click();
                clearInterval(checkButtonEnabled); // Clear the interval once clicked
            }
        };

        // Set an interval to check every 500 milliseconds if the button is enabled
        var checkButtonEnabled = setInterval(attemptApplyCoupon, 500);
    }
});
</script>
```


---

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