# How can we help?

## Overview

This article shows you how to get your lightbox to display on Infinite Scroll.

## If your URL does not change

You would need to call our function any time that they want to signal a "new page view". This will tell our code to re-process itself, and display any eligible boxes.

```javascript
window.PRIMER_API.LIGHTBOX.onInfiniteScrollPageChanged(url, send_pv_event, update_pv_based_vars, use_master_rules, re_calc_ab_tests);
```

Since the URL doesn't change, we want that to be an empty string (which tells us to just use the current URL). The other parameters are boolean values (true/false). We recommend the following setup:

```javascript
window.PRIMER_API.LIGHTBOX.onInfiniteScrollPageChanged("", true, true, false, false);
```

## If your URL changes

Same as above, just use instead:

```
var new_url = window.location.href;
window.PRIMER_API.LIGHTBOX.onPageUrlChanged(new_url, true, true, false, false);
```

## Troubleshooting

If your function is being called before the primer webforms script loads:

- Wait to call the function for a second or two.
- Or, alternatively, implement the following retry policy:

```javascript
var retryPrimerPageChangeInterval = setInterval(function() {
  if (window.PRIMER_API.LIGHTBOX.isPrimerReady()) {
    window.PRIMER_API.LIGHTBOX.onInfiniteScrollPageChanged("", true, true, false, false);
    clearInterval(retryPrimerPageChangeInterval);
  }
}, 500);
```