RxJs for retrying to see if a value has changed over a period

repeat.ts

const state = Observable.timer(1000) // every second
  .map(() => this.loaded)
  .repeat(8) // retry 8 times
  .retry();
state.subscribe((res) => {
  // this is the main body of the retry
  console.log('Result: ', res) // will out put false 8 times for the loaded value.
  }, (err) => { }, () => {
    if (this.loaded === false) {
      this.errorLoading = true; // If it hasn't loaded in 8 secs it ain't gonna ;)
    }
  });