Tryit Editor v2.9

Edit This Code:
<!DOCTYPE html>
<html>
<link rel="stylesheet" href="../lib/w3.css">
<script src="../lib/w3data.js"></script>
<body>

<select id="id01">
<option w3-repeat="customers">{{CustomerName}}</option>
</select>

<script>
w3Http("customers.php", function () {
    if (this.readyState == 4 && this.status == 200) {
        var myObject = JSON.parse(this.responseText);
        w3DisplayData("id01", myObject);
    }
});
</script>

</body>
</html>