@shopify/app-bridge-host/esm/eventHandlers.js

App Bridge Host contains components and middleware to be consumed by the app's host, as well as the host itself. The middleware and `Frame` component are responsible for facilitating communication between the client and host, and used to act on actions se

import { retain, release } from '@remote-ui/core';

function createEventHandlers(createListener) {
    var unsubscribers = new Map();
    return {
        addEventListener: function (event, listener) {
            var _a;
            var unsubscribe = createListener(event, listener);
            retain(listener);
            if (!unsubscribers.has(event)) {
                unsubscribers.set(event, new Map());
            }
            (_a = unsubscribers.get(event)) === null || _a === void 0 ? void 0 : _a.set(listener, function () {
                release(listener);
                unsubscribe();
            });
        },
        removeEventListener: function (event, listener) {
            var _a, _b;
            var unsubscribe = (_a = unsubscribers.get(event)) === null || _a === void 0 ? void 0 : _a.get(listener);
            if (unsubscribe) {
                unsubscribe();
                (_b = unsubscribers.get(event)) === null || _b === void 0 ? void 0 : _b.delete(listener);
            }
        },
    };
}

export { createEventHandlers };