Made a more sophisticaded nested Promises that await for each data fetch. After the chained fetches an array wil be populated with the correct data, all needed images for smooth transitioning will be loaded and update the button with a new event listener + state.
Keyfocus points:
- Writing a fetch properly without fault.
- Experiment more with then and what's capable with the method. (https://www.youtube.com/watch?v=vn3tm0quoqE)