List.JS - Filter with comma separated values - list.js

Question

I'm trying to create a dropdown to filter based on dates, but I would like to be able to comma separate the dates instead of initilizing each field as a separate filter, which would be slow when you account for hundreds of dates, and each list item having 30+ dates each.
I thought maybe list.js supports comma separated fields, but I can't find any obvious solution online.
Here is a simple codepen with the code working with a single field:
https://codepen.io/mauricekindermann/pen/QWyqzQL
This: <span class="stat filter_dates">1999,2099,2199</span>
Instead of this: <span class="stat filter_dates">1999</span>
Is this possible? Or do I need to initiate each date as a separate filter?

Answer 1

I didn't get any answers and couldn't find an obvious soultion to this. So the final result uses this method (JS script inside a PHP file)
<script>
var options = {
valueNames: [
'id',
<?
while($item= mysqli_fetch_array($query))
{
?>
'filter_<?=$item['id']?>',
<?
}
?>
]
};
$(document).ready(function()
{
if($('#filter').length > 0)
{
$('#filter').change(function ()
{
var selection = this.value;
<?
$i=0;
mysqli_data_seek($query, 0);
while($item= mysqli_fetch_array($query))
{
if($i==0){
$type='if';
} else {
$type='else if';
}
?>
<?=$type?>(selection == '<?=$item['id']?>')
{
userList.filter(function (item) {
return (item.values().<?='filter_'.$item['id']?> == selection);
});
}
<?
$i++;
}
if($i > 0){
?>
else {
userList.filter();
}
<?
}
?>
});
};
});
</script>