understanding fetch request and promises code example

Example 1: xml http request fetch

fetch('my/url/').then(respone()=>{
		console.log(response);
}

Example 2: javascript fetch get data from promise

var x = fetch(SOME_URL, SOME_POST_DATA)
    .then((response) => response.json())
    .then((responseJSON) => {
       // do stuff with responseJSON here...
       console.log(responseJSON);
    });