devextreme/esm/__internal/events/utils/m_event_nodes_disposing.js

JavaScript/TypeScript Component Suite for Responsive Web Development

/**
 * DevExtreme (esm/__internal/events/utils/m_event_nodes_disposing.js)
 * Version: 25.2.7
 * Build date: Tue May 05 2026
 *
 * Copyright (c) 2012 - 2026 Developer Express Inc. ALL RIGHTS RESERVED
 * Read about DevExtreme licensing here: https://js.devexpress.com/Licensing/
 */
import eventsEngine from "../../../common/core/events/core/events_engine";
import {
    removeEvent
} from "../../../common/core/events/remove";

function nodesByEvent(event) {
    return event && [event.target, event.delegateTarget, event.relatedTarget, event.currentTarget].reduce((res, node) => {
        if (!!node && !res.includes(node)) {
            res.push(node)
        }
        return res
    }, [])
}
export const subscribeNodesDisposing = (event, callback) => {
    const nodes = nodesByEvent(event);
    const onceCallback = function() {
        eventsEngine.off(nodes, removeEvent, onceCallback);
        return callback(...arguments)
    };
    eventsEngine.on(nodes, removeEvent, onceCallback);
    return {
        onceCallback: onceCallback,
        nodes: nodes
    }
};
export const unsubscribeNodesDisposing = (event, callback, nodes) => {
    eventsEngine.off(nodes || nodesByEvent(event), removeEvent, callback)
};