tav-ui/es/packages/utils/mitt2.mjs

Tav UI

function mitt(all) {
  all = all || /* @__PURE__ */ new Map();
  return {
    all,
    on(type, handler) {
      const handlers = all?.get(type);
      const added = handlers && handlers.push(handler);
      if (!added) {
        all?.set(type, [handler]);
      }
    },
    off(type, handler) {
      const handlers = all?.get(type);
      if (handlers) {
        handlers.splice(handlers.indexOf(handler) >>> 0, 1);
      }
    },
    emit(type, evt) {
      ;
      (all?.get(type) || []).slice().forEach((handler) => {
        handler(evt);
      });
      (all?.get("*") || []).slice().forEach((handler) => {
        handler(type, evt);
      });
    },
    clear() {
      this.all.clear();
    }
  };
}

export { mitt };
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