JavaScript: Firebase Realtime Database write Data but Variable in dictionary is not recognized Code Answer

I want to write my Data in a Firebase Realtime Database, but the problem is that the first value of the child should have the value of a variable but the variable is not recognized at variable. It should look like this:

so I tried:

let id = chatid + "::::" + username;
let input = document.getElementById('input').value;
 
firebase.database().ref('chat/'+ chatid + "/chat").set({
   id: input
})

but the id variable is not recognized as a variable, thats why in the firebase console it looks like this:

How to fix that?

Answer

You need to do as follows:

let id = chatid + "::::" + username;
let input = document.getElementById('input').value;

firebase
    .database()
    .ref('chat/' + chatid + '/chat/' + id)
    .set(input);

or as follows:

  firebase
    .database()
    .ref('chat/' + chatid + '/chat')
    .set({
      [id]: input,
    });

More detail on the square brackets approach in this SO answer.