jQuery.cookie.js取cookie值为undefined

今天用jquery.cookie.min.js存取cookie时，发现取出来的cookie值为undefined

• 引用文件

<script src="/xxx/static/plugins/jquery.js"></script>
<script src="/xxx/static/plugins/jquery.cookie.min.js"></script>

• js

$.cookie('phone', phone, {expires: 7, path: '/xxx'});
console.log("cookie=====" + $.cookie("userPhone"))

控制台打出来的cookie值是undefined，找了下http访问的，要多加个secure: false

$.cookie('phone', phone, {expires: 7, path: '/xxx', secure: false});
console.log("cookie=====" + $.cookie("userPhone"))

就找找jquery.cookie的具体用法吧