移动解析双11优惠活动

// 使用懒加载技术优化图片加载
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Flask框架优化API响应时间
from flask import Flask, jsonify
import time

app = Flask(__name__)

@app.route('/api/discount', methods=['GET'])
def get_discount():
    start_time = time.time()
    # 模拟数据处理
    discount_data = fetch_discount_data()
    response_time = time.time() - start_time
    print(f"Response time: {response_time} seconds")
    return jsonify(discount_data)

def fetch_discount_data():
    # 模拟从数据库获取数据
    return {"discount": "50%", "description": "双11大促"}

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