// 将对象的键添加到数组

var arr = Object.keys(site);

//英文

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/keys

 

中文

https://developer.mozilla.org/zh-CN/

 

https://developer.mozilla.org/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/Object/keys