How do I hide a button in a repeater's item when its dB field is empty?

[contact13073]

Here is what I got so far:

$w.onReady(() => {
  $w('#repeater1').onItemReady(($wdataset1, Quote) => {
 const urlEmpty = !Quote.url
 if (urlEmpty)
        $wdataset1('#button8').collapse()
  })
});

It makes all buttons collapse.