The initial datepicker value.
Examples
Javascript
<input id="datepicker" width="312" />
<script>
$('#datepicker').datepicker({
value: '01/01/2022'
});
</script>
HTML
<input id="datepicker" width="312" value="01/01/2022" />
<script>
$('#datepicker').datepicker();
</script>