Javascript function returns undefined even though value exists

Asked Apr 14 '19 at 15:14

Active Apr 14 '19 at 15:14

Viewed 41 times

My Javascript function returns undefined, even though a value exists. When I console.log() my return value, it will output the value but not return it.

function uidToUser(uid) {
        var docRef = db.collection("nfcChips").doc(uid);
        docRef.get().then(function(doc) {
            if (doc.exists) {
                user = doc.data().holder
                console.log(user) //logs correct value 
                return user; //returns undefined
            }
        }).catch(function(error) {
            console.error("Error getting2 document:", error);
            return "error";
        });
    }

asked Apr 14 '19 at 15:14

Leonard Niehaus

The `console.log` that produces `undefined` is missing from your example. – mbojko Apr 14 '19 at 15:16
@mbojko No, it isn't. `console.log(user) //logs correct value` – Leonard Niehaus Apr 14 '19 at 15:18
So where do you observe that `undefined`? – mbojko Apr 14 '19 at 15:20

Javascript function returns undefined even though value exists

0 Answers0