Method setupVisibilityHandler

src/js/performance.js:217–233

()

  // 页面可见性处理（暂停/恢复滚动效果）
  setupVisibilityHandler() {
    document.addEventListener('visibilitychange', () => {
      if (document.hidden) {
        // 页面不可见时，断开滚动观察器
        const scrollObserver = this.observers.get('scroll');
        if (scrollObserver) {
          scrollObserver.disconnect();
        }
      } else {
        // 页面可见时，重新连接滚动观察器
        const scrollObserver = this.observers.get('scroll');
        if (scrollObserver) {
          scrollObserver.observe(document.documentElement);
        }
      }
    });
  }

  // 显示加载状态
  showLoading(message = '加载中...') {