DevExtreme jQuery/JS - Control the Behavior

If you need to add spin buttons to the NumberBox, set the showSpinButtons to true.

JavaScript
$(function() {
    $("#numberBoxContainer").dxNumberBox({
        value: 20,
        showSpinButtons: true
    });
});

To specify the step by which the value is changed, use the step option.

JavaScript
$(function() {
    $("#numberBoxContainer").dxNumberBox({
        value: 20,
        showSpinButtons: true,
        step: 10
    });
});
See Also