beforeChangeProperties

fires before configuration attributes of the control are changed dynamically

beforeChangeProperties: (properties: object) => boolean | void;

Parameters:

• properties: object - an object with the configuration attributes of the control and their new values

Returns:

Return false to cancel the default action of the event; otherwise, true.

Example

form.getItem("fieldset").events.on("beforeChangeProperties", properties => {
    console.log("beforeChangeProperties", properties);
    return true;
});