gistfile1.txt

makeApiCall(url) {
    return fetch(url)
      .then((response) => {
        if (!response.ok) {
          throw new Error("Network response was not ok");
        }
        return response.json();
      })
      .then(function (data) {
        return data.observations[0];
      })
      .catch((error) => {
        throw new Error(
          "There has been a problem with your fetch operation:" + error
        );
      });
  }
  fetchWeather() {
      //fetch the observation
    
    let url =
      "https://api.weather.com/v2/pws/observations/current?stationId=" +
      this.station +
      "&format=json&units=" +
      this.units +
      "&apiKey=" +
      this.api_key;
  
    this.makeApiCall(url).then((observation) => {
        // Here I want to set an instance variable
        //this doesn't work.
        this.observation=observation;
        // weather data is defined as a const ourside the class
        // this does work.
        weather_data['observation']=observation;
      return observation;
      
    });
    // this is undefined
    console.log(this.observation);
    // this is OK
    console.log(weather_data);