<!-- 即配置文件 -->
<script src="/config.js"></script>
<!-- 动态加载js -->
<script type="application/javascript">
  if (config.devMode == 'dev') {
    loadJs("开发环境的js");
  } else {
    loadJs("开发环境的js");
  }  

  function loadJs(url, callback) {
    // 实现
  }
</script>

var config = {
  // 或者 prd
  devMode: 'dev',
  // 还可以配置请求后台的url前缀
  serverUrl: 'http://dev.company.com'
  // serverUrl: 'http://api.company.com'
}

server {
  listen    80;
  server_name www.company.com;

  location / {
    root /Users/sunhao/Documents/company/project;
    index index.html;
    try_files $uri $uri/ /index.html;
    expires -1;
  }
}
server {
  listen    80;
  server_name debug.company.com;

  location / {
    root /Users/sunhao/Documents/company/project;
    index index.html;
    try_files $uri $uri/ /index.html;
    expires -1;
  }

  location ~ .flower\.js$ {
    root /Users/sunhao/Documents/company/project/js;
  }
}