將Firebase onAuth回調綁定到可觀察對象

Question

我試圖將導致到Firebase中的onAuth()請求的回調綁定到RxJS可觀察對象。

let auth = Observable.bindCallback(ref.onAuth); 
let source = auth(); 
let subscription = source.subscribe(
    (x) => console.log(x), 
    (e) => console.log(e) 
); 

我得到的錯誤：

Cannot read property 'O' of undefined at BoundCallbackObservable.X.Ig [as callbackFunc]

在此先感謝您的幫助！ 。

Answer 1

看來這個問題是不正確的情況下回調函數執行這應該修復它：

let auth = Observable.bindCallback(ref.onAuth.bind(ref));