I have this code, but i don't know how capture a error.
const coleccionRef = database.ref('test');
coleccionRef.on('value', snapshot => {
snapshot.val();
});
Any idea?
I have this code, but i don't know how capture a error.
const coleccionRef = database.ref('test');
coleccionRef.on('value', snapshot => {
snapshot.val();
});
Any idea?
Share Improve this question edited Dec 5, 2017 at 15:34 Frank van Puffelen 601k85 gold badges890 silver badges860 bronze badges asked Dec 5, 2017 at 11:09 allelallel 8771 gold badge12 silver badges22 bronze badges 1-
1
you may check that you have a data or empty with
if(snapshot.exists()) { // do something with data } else {//there is no data}firebase.google./docs/reference/js/… – Cappittall Commented Dec 5, 2017 at 11:17
1 Answer
Reset to default 8If your client doesn't have permission to read from the reference, Firebase will invoke the (optional) second callback that you can pass in to on(). E.g.
const coleccionRef = database.ref('test');
coleccionRef.on('value', snapshot => {
snapshot.val();
}, error => {
console.error(error);
});
I remend reading the Firebase reference documentation for finding more tidbits like this.