Well done! A good short code with good structured overview.
Perhaps to make it even more simple, you also could just use “black” and “yellow” to set your colors… like …
$w.onReady(() => {
$w("#dynamicDataset").onReady(() => {
let itemObj = $w("#dynamicDataset").getCurrentItem().creases;
if(itemObj===true){$w("#box2").style.backgroundColor = "black";}
else{$w("#box2").style.backgroundColor = "yellow";}
});
});