生活缴费平台特价

// 使用懒加载技术优化页面加载速度
document.addEventListener("DOMContentLoaded", function() {
    const images = document.querySelectorAll("img.lazy");
    const observer = new IntersectionObserver((entries, observer) => {
        entries.forEach(entry => {
            if (entry.isIntersecting) {
                const img = entry.target;
                img.src = img.dataset.src;
                img.classList.remove("lazy");
                observer.unobserve(img);
            }
        });
    });
    images.forEach(img => {
        observer.observe(img);
    });
});

# 使用缓存减少数据库查询次数
from flask import Flask
from flask_caching import Cache

app = Flask(__name__)
cache = Cache(app, config={'CACHE_TYPE': 'redis'})

@app.route('/api/fee')
@cache.cached(timeout=60)
def get_fee():
    # 假设这里是从数据库获取费用信息的复杂操作
    return {"fee": "100"}

if __name__ == '__main__':
    app.run()