@ly-js/ui/es/event-hub/index.mjs

`@ly-js/ui` 是基于`vue3`常用库，会在`@ly-js/element`、`@ly-js/vant`中引入

function eventHub(all) {
  all = all || /* @__PURE__ */ new Map();
  return {
    all,
    on(type, handler) {
      const handlers = all.get(type);
      if (handlers) {
        handlers.push(handler);
      } else {
        all.set(type, [handler]);
      }
    },
    once(type, handler) {
      const handlers = all.get(type);
      const onceHandler = (evt) => {
        this.off(type, onceHandler);
        handler(evt);
      };
      if (handlers) {
        handlers.push(onceHandler);
      } else {
        all.set(type, [onceHandler]);
      }
    },
    off(type, handler) {
      const handlers = all.get(type);
      if (handlers) {
        if (handler) {
          handlers.splice(handlers.indexOf(handler) >>> 0, 1);
        } else {
          all.set(type, []);
        }
      }
    },
    emit(type, evt) {
      let handlers = all.get(type);
      if (handlers) {
        ;
        handlers.slice().map((handler) => {
          handler(evt);
        });
      }
      handlers = all.get("*");
      if (handlers) {
        ;
        handlers.slice().map((handler) => {
          handler(type, evt);
        });
      }
    }
  };
}

export { eventHub };