What is snapshotchanges in firestore

Question

this function is called by the constructor. can someone explain in depth to me what it does?

  initializeItems(){
this.travelList$ = this.plsdala.getTravelLi         


        

Answer 1

To push the observables into an array do something like this.

let travelArray = [];
this.travelList$.subscribe(res => {
  res.map(c => {
    travelArray.push(c);
  })
})
console.log(travelArray);