如何等待respondjs上的FB.login（）回調？

Question

我想使用一個異步函數，在fb登錄後使用FB令牌發佈API（如下所示）。不幸的是，在登錄回調之前會輸出未定義的accessToken。

// fbsdk 
window.fbAsyncInit = function() { 
    FB.init({ 
    appId  : '', 
    xfbml  : true, 
    version : 'v2.8' 
    }); 
    FB.AppEvents.logPageView(); 
}; 

(function(d, s, id){ 
    var js, fjs = d.getElementsByTagName(s)[0]; 
    if (d.getElementById(id)) {return;} 
    js = d.createElement(s); js.id = id; 
    js.src = "//connect.facebook.net/en_US/sdk.js"; 
    fjs.parentNode.insertBefore(js, fjs); 
}(document, 'script', 'facebook-jssdk')); 
export default async function request(url, options) { 

    let accessToken = await FB.login(function (res) { 
     console.log(res.authResponse.accessToken) 
     return res.authResponse.accessToken; 
    }); 

    console.log(accessToken); 
    url = url+ '/access_token?=' + accessToken 
    const response = await fetch(url, { 
     method: 'POST', 
     body: {'access_token': accessToken}, 
    }); 

    const data = await response.json(); 

    const ret = { 
     data, 
     headers: {}, 
    }; 

    if (response.headers.get('x-total-count')) { 
     ret.headers['x-total-count'] = response.headers.get('x-total-count'); 
    } 

    console.log(ret); 

    return ret; 

} 

Answer 1

您需要使用window.FB.Event.subscribe('auth.statusChange', your_callback_function)和your_callback_function你可以從Facebook獲得的accessToken。