英文识别双十一优惠活动

// 使用懒加载技术优化图片加载
document.addEventListener("DOMContentLoaded", function() {
    let lazyImages = [].slice.call(document.querySelectorAll("img.lazy"));
    if ("IntersectionObserver" in window) {
        let lazyImageObserver = new IntersectionObserver(function(entries, observer) {
            entries.forEach(function(entry) {
                if (entry.isIntersecting) {
                    let lazyImage = entry.target;
                    lazyImage.src = lazyImage.dataset.src;
                    lazyImage.classList.remove("lazy");
                    lazyImageObserver.unobserve(lazyImage);
                }
            });
        });
        lazyImages.forEach(function(lazyImage) {
            lazyImageObserver.observe(lazyImage);
        });
    }
});

# 使用Flask框架进行异步处理
from flask import Flask, jsonify
import asyncio

app = Flask(__name__)

async def fetch_data():
    await asyncio.sleep(1)  # 模拟耗时操作
    return {"data": "processed"}

@app.route('/data')
async def get_data():
    result = await fetch_data()
    return jsonify(result)

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