layers.valueField String (default: "value")

The value field for bubble layer symbols. The data item field should be a number.

Example - Set bubble layer fields

<div id="map"></div>
<script>
    $("#map").kendoMap({
        layers: [{
            type: "bubble",
            locationField: "loc",
            valueField: "val",
            dataSource: {
                data: [{
                    "loc": [42, 2], "val": 100
                }, {
                    "loc": [45, 7], "val": 150
                }]
            }
        }]
    });
</script>