javascript - Facebook javascript 与 RoR 集成不起作用

Question

使用 Javascript FB.getLoginStatus 登录 Facebook 在一种情况下有效，但在另一种情况下无效。

这有效:

//view
<script type="text/javascript">
function f1() {
FB.getLoginStatus(function(response) {
  if (response.status === 'connected') {
    // the user is logged in and has authenticated your
    // app, and response.authResponse supplies
    // the user's ID, a valid access token, a signed
    // request, and the time the access token 
    // and signed request each expire
    FB.api('/me', function(response) {
      alert(response.name + " " + response.id);
      name1 = response.name;
      uid1 = response.id;
    });
    // var uid = response.authResponse.userID;
    // var accessToken = response.authResponse.accessToken;
  } else if (response.status === 'not_authorized') {
    // the user is logged in to Facebook, 
    // but has not authenticated your app
  } else {
    // the user isn't logged in to Facebook.
  }
 });
}
</script>

<%= content_for :body_attributes, "onload='f1();'" %>

这不起作用

// view
<script type="text/javascript">
function f1() {
    // same definition as above
    }
 </script>

<script type="text/javascript"> {
f1()
    }
 </script>

我不明白为什么第二个代码不起作用。谢谢!

Answer 1

<script type="text/javascript"> 
{
    f1()
}
 </script>

去掉大括号并添加分号就可以了:

<script type="text/javascript"> 
    f1();
 </script>