What are the pros and cons to these approaches for a JavaScript API service?

I noticed that I've implemented API services using three different approaches for some of the hobby Apps I've built (probably following different tutorials).

1st approach - using classes

export default class APIService {

  public getItems() {
    return fetch(EXAMPLE_URI);
  }

}

With this approach you have to import the service and create a new Instance to use it. (or maybe make a singleton)

2nd approach - using classes with static functions

export default class APIService {

  static getItems() {
    return fetch(EXAMPLE_URI);
  }

}

Now you just can import APIService and use it directly like APIService.getItems()

3rd approach - exporting functions

export const getItems = () => fetch(EXAMPLE_URI);

With this approach you can just import the functions you actually need

Are there any major downsides to either of these? or is it just personal preference?