Nginx 1.13.9 已支持 HTTP/2 Server Push 。

详见：Introducing HTTP/2 Server Push with NGINX 1.13.9

最简单的用法如下

server {
    # Ensure that HTTP/2 is enabled for the server
    listen 443 ssl http2;


    ssl_certificate ssl/certificate.pem;
    ssl_certificate_key ssl/key.pem;

    root /var/www/html;

    # whenever a client requests demo.html, also push
    # /style.css, /image1.jpg and /image2.jpg
    location = /demo.html {
        http2_push /style.css;
        http2_push /image1.jpg;
        http2_push /image2.jpg;
    }
}

HTTP/2 Server Push 意味着什么？