Hide certain items on a dataset

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@wistickers I’m not sure of your use case here in why you are wanting to do this, but a simple way to do it would be to use the onItemReady function and collapse the container for the first 15 items. In case you’re not familiar with how repeaters work, there is always a container with a name that the various elements get added to in a repeater. Click once on the repeater and then again in an area that doesn’t have an element, and you will see the ID of the container in the property sheet.

$w.onReady(function () {
    $w("#repeater1").onItemReady(($item,itemData,index) => {
        if (index < 15) {
            $item("#container1").collapse();
        }
    })
});