I wanted to convert firebase timestamp to UTC timeview in react native

Question

i have been searching for solution for 2 days now here is my code

saveData = () =>{
    let servertime = Firebase.database.ServerValue.TIMESTAMP;
    this.itemsRef.push({name:this.state.text,date:servertime});
    var s = new Date(parseInt(servertime)).toUTCString();
    alert(s);
  }

but alert return me with invalid value i try to put an unix interger directly like this

saveData = () =>{
        let servertime = Firebase.database.ServerValue.TIMESTAMP;
        this.itemsRef.push({name:this.state.text,date:servertime});
        var s = new Date(1509004701954).toUTCString();
        alert(s);
      }

and it work well why cant i get the same result?

`Firebase.database.ServerValue.TIMESTAMP` is a placeholder constant that serves as an instruction for the sever to replace it will the actual sever time when it's received. — cartant, Oct 26 '17 at 08:04

score 2 · Accepted Answer · answered Oct 27 '17 at 17:52

Firebase.database.ServerValue.TIMESTAMP is a constant that represents the object { ".sv": "timestamp" }. Firebase uses it to automatically put in the current timestamp.

You need to push the data, then grab the snapshot and read the 'date' back:

saveData = () => {
   this.itemsRef.push(
       {
           name:this.state.text, 
           date:Firebase.database.ServerValue.TIMESTAMP
       }).then((snapshot) => {
           var s = new Date(parseInt(snapshot.val().date)).toUTCString();
           alert(s);
       }
 }

I wanted to convert firebase timestamp to UTC timeview in react native

1 Answers1