nginx转发的api请求获取到的是index而不是json数据

Question

    server {
        listen       8088;
        server_name  localhost;

        #charset koi8-r;

        #access_log  logs/host.access.log  main;
    
    access_log c:/access.log combined;

    location ~ .*?\.(js|css|jpg|png|jpeg|less|sass){                
        root C:\static\music; 
        }    


        location / {
            root   C:\static\music;
            index  index.html index.htm;
        try_files $uri /index.html;
        }


    location ^~/api/ {
             proxy_pass http://127.0.0.1:3111;
        }

        #error_page  404              /404.html;

        # redirect server error pages to the static page /50x.html
        #
        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
            root   html;
        }

        # proxy the PHP scripts to Apache listening on 127.0.0.1:80
        #
        #location ~ \.php$ {
        #    proxy_pass   http://127.0.0.1;
        #}

        # pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
        #
        #location ~ \.php$ {
        #    root           html;
        #    fastcgi_pass   127.0.0.1:9000;
        #    fastcgi_index  index.php;
        #    fastcgi_param  SCRIPT_FILENAME  /scripts$fastcgi_script_name;
        #    include        fastcgi_params;
        #}

        # deny access to .htaccess files, if Apache's document root
        # concurs with nginx's one
        #
        #location ~ /\.ht {
        #    deny  all;
        #}
    }

这是首屏时候的一个api请求，其他路由页面上的api请求正常，这是为何？