@eolme/vma-engine/dist/modules/bus.js

Engine for VK Mini Apps

const createBus = () => {
    const mettEvents = new Map();
    const onceEvents = new Map();
    const mett = {
        on(type, handler) {
            const set = mettEvents.get(type);
            if (set) {
                set.add(handler);
            }
            else {
                mettEvents.set(type, new Set([handler]));
            }
        },
        once(type, handler) {
            const wrapper = (event, type) => {
                mett.off(type, handler);
                handler(event, type);
            };
            onceEvents.set(handler, wrapper);
            const set = mettEvents.get(type);
            if (set) {
                set.add(wrapper);
            }
            else {
                mettEvents.set(type, new Set([wrapper]));
            }
        },
        off(type, handler) {
            const once = onceEvents.get(handler);
            if (once) {
                onceEvents.delete(handler);
                handler = once;
            }
            const set = mettEvents.get(type);
            if (set) {
                set.delete(handler);
            }
        },
        emit(type, event = null) {
            const setName = mettEvents.get(type);
            if (setName) {
                setName.forEach((handler) => {
                    handler(event, type);
                });
            }
        },
        clear() {
            mettEvents.clear();
            onceEvents.clear();
        }
    };
    return mett;
};
const readonlyBus = createBus();
export { createBus, readonlyBus as bus, readonlyBus as default };