Getting all documents from one collection in Firestore

Hi I’m starting with javascript and react-native and I’m trying to figure out this problem for hours now. Can someone explain me how to get all the documents from firestore collection ?

I have been trying this:

async getMarkers() {
  const events = await firebase.firestore().collection('events').get()
    .then(querySnapshot => {
      querySnapshot.docs.map(doc => {
        console.log('LOG 1', doc.data());
        return doc.data();
      });
    });
  console.log('LOG 2', events);
  return events;
}

Log 1 prints all the objects(one by one) but log 2 is undefined, why ?

Answer

The example in the other answer is unnecessarily complex. This would be more straightforward, if all you want to do is return the raw data objects for each document in a query or collection:

async getMarker() {
    const snapshot = await firebase.firestore().collection('events').get()
    return snapshot.docs.map(doc => doc.data());
}