DevExtreme jQuery/JS - Handle Events

Subscribe to an Event

You can subscribe to an event using a configuration option. All event handling options are given names that begin with on.

JavaScript

$("#menuContainer").dxMenu({
    onItemClick: function (info) {
        // Handles the "itemClick" event
    },
    onSelectionChanged: function (info) {
        // Handles the "selectionChanged" event
    }
});

As a more flexible solution, you can use the on() method. It allows you to subscribe to events at runtime and even to attach several handlers to a single event.

JavaScript

var menuInstance = $("#menuContainer").dxMenu("instance");
// Subscribes to the "itemClick" and "selectionChanged" events
menuInstance
    .on({
        "itemClick": handler1,
        "selectionChanged": handler2
    });

JavaScript

var menuInstance = $("#menuContainer").dxMenu("instance");
// Attaches several handlers to the "itemClick" event
menuInstance
    .on("itemClick", handler1)
    .on("itemClick", handler2);

Unsubscribe from an Event

To detach all the handlers that you attached with the on() method, call the off() method without arguments.

JavaScript

$("#menuContainer").dxMenu("instance").off();

Also, you can call this method to detach a specific handler from an event or all handlers from a particular event.

JavaScript

var menuInstance = $("#menuContainer").dxMenu("instance");
// Detaches the "handler1" from the "itemClick" event leaving other handlers (if any) intact
menuInstance.off("itemClick", handler1)

JavaScript

var menuInstance = $("#menuContainer").dxMenu("instance");
// Detaches all handlers from the "itemClick" event
menuInstance.off("itemClick")

If you subscribed to an event using an onEventName option, you can unsubscribe from it by setting this option to undefined.

JavaScript

var menuInstance = $("#menuContainer").dxMenu("instance");
menuInstance.option("onItemClick", undefined);

DevExtreme jQuery/JS - Handle Events

Subscribe to an Event

See Also

Unsubscribe from an Event

See Also