Retrieve firebase data to web

Question

// Initialize Firebase var config = { apiKey: "AIzaSyBz13eirmEOGD1uXOZwf6tKGnEsjfwsUFo", authDomain: "platformtechproject.firebaseapp.com", databaseURL: "https://platformtechproject.firebaseio.com", projectId: "platformtechproject", storageBucket: "platformtechproject.appspot.com", messagingSenderId: "1065758005439" }; firebase.initializeApp(config); var database = firebase.database(); var msgRef = firebase.database().ref('survey'); //console.log(firebase); var msgRef = firebase().ref('survey'); msgRef.on('value',gotData,errData);

I continue getting this error [Uncaught TypeError: firebase is not a function] as i am trying to read firebase data to web. Chrome console error

stackoverflow.com/questions/37369466/…

takendarkk
– takendarkk

2018-03-23 13:54:59 +00:00
Commented Mar 23, 2018 at 13:54 — takendarkk
– takendarkk, Commented Mar 23, 2018 at 13:54

Daniel Vukasovich · Accepted Answer · 2018-03-23 14:13:25Z

here's how your code must be:

<script src="https://www.gstatic.com/firebasejs/4.8.0/firebase.js"></script> <script> // Initialize Firebase var config = { apiKey: "AIzaSyBz13eirmEOGD1uXOZwf6tKGnEsjfwsUFo", authDomain: "platformtechproject.firebaseapp.com", databaseURL: "https://platformtechproject.firebaseio.com", projectId: "platformtechproject", storageBucket: "platformtechproject.appspot.com", messagingSenderId: "1065758005439" }; firebase.initializeApp(config); var database = firebase.database(); var msgRef = database.ref('survey'); msgRef.on("child_added",function(snapshot) { var changedPost = snapshot.val(); console.log(changedPost) }); </script>

The code above works as you expect:

Note that msgRef listens on these predefined "events".

Details here: Read Event Types

Regards

Peter Haddad · Accepted Answer · 2018-03-23 14:09:54Z

Change this:

 var database = firebase.database(); var msgRef = firebase.database().ref('survey'); //console.log(firebase); var msgRef = firebase().ref('survey'); msgRef.on('value',gotData,errData);

to this:

 var database = firebase.database(); var msgRef = database.ref('survey'); msgRef.on('value', function(snapshot) { //retrieve data });

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