企业人力资源管理助手大促

// 使用懒加载技术优化图片加载
const images = document.querySelectorAll('img[data-src]');

const lazyLoad = target => {
  const io = new IntersectionObserver((entries, observer) => {
    entries.forEach(entry => {
      if (entry.isIntersecting) {
        const img = entry.target;
        const src = img.getAttribute('data-src');
        img.setAttribute('src', src);
        img.removeAttribute('data-src');
        observer.disconnect();
      }
    });
  });
  io.observe(target);
};

images.forEach(lazyLoad);

# 使用缓存机制减少数据库查询次数
from functools import lru_cache
import sqlite3

@lru_cache(maxsize=128)
def get_employee_data(employee_id):
    conn = sqlite3.connect('hr_database.db')
    cursor = conn.cursor()
    cursor.execute('SELECT * FROM employees WHERE id = ?', (employee_id,))
    data = cursor.fetchone()
    conn.close()
    return data