ufaclub,
<!DOCTYPE html>
<html>
<head>
<title>Untitled</title>
<meta charset="utf-8">
<style type="text/css">
</style>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.6.0/jquery.min.js"></script>
<script>
$(function() {
$('select#mark').on('change', function() {
alert(this.value);
});
let url_color = 2;
$(`select#mark option[value=${url_color}]`).prop('selected', true);
$('select#mark').trigger('change');
});
</script>
</head>
<body>
<select name="" id="mark">
<option value="test">test</option>
<option value="2">2</option>
</select></body>
</html>