How to get the key from a Firebase data snapshot?

Question

I\'m able to query my users array with an e-mail address and return the user\'s account info:

users.orderByChild(\'email\').equalTo(authData.user.em         


        

Answer 1

Similar to camden_kid, I used Object.keys(arr), but in three lines:

var arr = snapshot.val();
var arr2 = Object.keys(arr);
var key = arr2[0];
console.log(key) // -KiBBDaj4fBDRmSS3j0r