return promise or any code example

Example 1: making promises in js

getData()
    .then(data => console.log(data))
    .catch(error => console.log(error));

Example 2: javascript promises

firstRequest()
  .then(function(response) {
    return secondRequest(response);
}).then(function(nextResponse) {  
    return thirdRequest(nextResponse);
}).then(function(finalResponse) {  
    console.log('Final response: ' + finalResponse);
}).catch(failureCallback);