WeatherApp is a web application that uses OpenWeatherMap API to get information about the current weather in a certain location. As mentioned, the app uses an API so you need to get a key in the OpenWeatherMap API website: https://openweathermap.org/
Once you've gotten the api key, you need to create a config file (config.js) with the following content:
var config = {
API_KEY:'XXXXXXX'
}
Where the value of API_KEY is the key you have obtained from the website mentioned before.
Here you can see an example of the app: