# UTM tracking and attribution in Wix Form

### Create Hidden Fields in your WIX Form

Make sure the Field Title matches to our naming convention here [What can I track with UTMSimple?](https://docs.utmsimple.com/books/101-lets-start/page/what-can-i-track-with-utmsimple)

[![](https://docs.utmsimple.com/uploads/images/gallery/2023-08/scaled-1680-/image-1691645537573.png)](https://docs.utmsimple.com/uploads/images/gallery/2023-08/image-1691645537573.png)

By default, these fields are not hidden, let's make them hidden

Go and Enable Dev mode

[![](https://docs.utmsimple.com/uploads/images/gallery/2023-08/scaled-1680-/image-1691645584527.png)](https://docs.utmsimple.com/uploads/images/gallery/2023-08/image-1691645584527.png)

Select each field and go to Dev Mode and select "Hidden"

[![](https://docs.utmsimple.com/uploads/images/gallery/2023-08/scaled-1680-/image-1691645639507.png)](https://docs.utmsimple.com/uploads/images/gallery/2023-08/image-1691645639507.png)

### Add the following code in Wix > Settings > Custom Code section
```
<script>
handl_custom_params=[];var handl_js=document.createElement("script");handl_js.setAttribute("src","https://track.utmsimple.com/utm.js?license=<license key>"),document.head.appendChild(handl_js),handl_js.onload=function(){

handlj('body').on('DOMNodeInserted', '#main_MF', function(e) {
  if (handlj(e.target).attr('id') === 'POPUPS_ROOT') {
    setTimeout(
		function(){
    		all = HandL.getAll()
        Object.keys(all).forEach((x) => {
            if (all[x]) {
                if (handlj('[name="'+x+'"]').length > 0) {

const element = document.querySelector('input[name="'+x+'"]')
const event = new Event('input', { bubbles: true })
const previousValue = element.value

element.value = all[x]
element._valueTracker.setValue(previousValue)
element.dispatchEvent(event)

                }
            }
        })
    		}, 2000)
  }
});

};
</script>
```

[![](https://docs.utmsimple.com/uploads/images/gallery/2023-08/scaled-1680-/image-1691645448532.png)](https://docs.utmsimple.com/uploads/images/gallery/2023-08/image-1691645448532.png)

### Testing

Test the form and you will see all the UTMs listed in the Form Submission section

[![](https://docs.utmsimple.com/uploads/images/gallery/2023-08/scaled-1680-/image-1691645699910.png)](https://docs.utmsimple.com/uploads/images/gallery/2023-08/image-1691645699910.png)