How to retrieve data from Firebase using Javascript?

Question

I\'m trying to access \"id\" and store it in a variable. So far the code I have is:

var ref = firebase.database().ref(\"users\");

ref.on(\"value\", fun         


        

Answer 1

You need to get key of parent-node(L2L6vBsd45DFGfh) to access id child

When you use push() method in firebase it will automatic generate unique key for your record. use set() or update() method to create your own custom keys.

var ref = firebase.database().ref("users");
ref.on("value", function(snapshot) {
    var childData = snapshot.val();
    var key = Object.keys(childData)[0];    //this will return 1st key.         
    console.log(childData[key].id);
});

You will use for-loop or forEach to get all keys.

Answer 2

Do this:

 var ref = firebase.database().ref("users");

ref.on("value", function(snapshot) {
 snapshot.forEach(function(childSnapshot) {
  var childData = childSnapshot.val();
  var id=childData.id;
  console.log(childData);
 });
});

In the above the location is at users then you use on() method to read data, and using the forEach loop, you iterate inside the pushid and get the values.

To access each one alone you do this var ids=childData.id; or/and var names=childData.name;

Also it is better to use once() as it only reads data once.