Method setupTouchOptimization

src/js/performance.js:184–214

()

  // 触摸优化
  setupTouchOptimization() {
    // 防止双击缩放
    let lastTouchEnd = 0;
    document.addEventListener('touchend', (event) => {
      const now = (new Date()).getTime();
      if (now - lastTouchEnd <= 300) {
        event.preventDefault();
      }
      lastTouchEnd = now;
    }, false);

    // 优化触摸反馈（使用CSS变量避免高频classList操作）
    document.addEventListener('touchstart', (e) => {
      const target = e.target.closest('.btn, .card, .form-control');
      if (target) {
        target.style.setProperty('--touch-active', '1');
        target.classList.add('touch-active');
      }
    }, { passive: true });

    document.addEventListener('touchend', (e) => {
      const target = e.target.closest('.btn, .card, .form-control');
      if (target) {
        // 使用requestAnimationFrame替代setTimeout，更高效
        requestAnimationFrame(() => {
          target.style.removeProperty('--touch-active');
          target.classList.remove('touch-active');
        });
      }
    }, { passive: true });
  }

  // 页面可见性处理（暂停/恢复滚动效果）
  setupVisibilityHandler() {