devextreme/cjs/__internal/integration/knockout/event_registrator.js

JavaScript/TypeScript Component Suite for Responsive Web Development

/**
 * DevExtreme (cjs/__internal/integration/knockout/event_registrator.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/
 */

"use strict";
var _event_registrator_callbacks = _interopRequireDefault(require("../../../common/core/events/core/event_registrator_callbacks"));
var _renderer = _interopRequireDefault(require("../../../core/renderer"));
var _m_type = require("../../core/utils/m_type");
var _m_events_engine = _interopRequireDefault(require("../../events/core/m_events_engine"));
var _index = require("../../events/utils/index");
var _knockout = _interopRequireDefault(require("knockout"));

function _interopRequireDefault(e) {
    return e && e.__esModule ? e : {
        default: e
    }
}
if (_knockout.default) {
    _event_registrator_callbacks.default.add(name => {
        const koBindingEventName = (0, _index.addNamespace)(name, `${name}Binding`);
        _knockout.default.bindingHandlers[name] = {
            update(element, valueAccessor, allBindingsAccessor, viewModel) {
                const $element = (0, _renderer.default)(element);
                const unwrappedValue = _knockout.default.utils.unwrapObservable(valueAccessor());
                const eventSource = unwrappedValue.execute ? unwrappedValue.execute : unwrappedValue;
                _m_events_engine.default.off($element, koBindingEventName);
                _m_events_engine.default.on($element, koBindingEventName, (0, _m_type.isPlainObject)(unwrappedValue) ? unwrappedValue : {}, e => {
                    eventSource.call(viewModel, viewModel, e)
                })
            }
        }
    })
}