update firebase code example

Example 1: firebase update cloud function

firebase deploy --only functions:functionNameHere

Example 2: add to firebase database

db.collection("cities").add({
    name: "Tokyo",
    country: "Japan"
})
.then(function(docRef) {
    console.log("Document written with ID: ", docRef.id);
})
.catch(function(error) {
    console.error("Error adding document: ", error);
});

Example 3: javascript write to firebase

function writeUserData(userId, name, email, imageUrl) {
  firebase.database().ref('users/' + userId).set({
    username: name,
    email: email,
    profile_picture : imageUrl
  });
}

Example 4: firebase set vs update

firebase.database().ref().child('/posts/' + newPostKey)
        .set({ title: "New title", body: "This is the new body" });

Example 5: firebase update data

await firebase.database().ref().update(updates);