How to make a function return the result of a query?

Question

JavaScript

I do this: If my function looks like this, then the test variable will be equal to 4:
var test = myFunc(2);

function test(id){
return id*2
        }

But I need to send a request inside the function, I try this, it doesn't work:

function test(id) {
            return  myService.getById(id).then(function (result) {
                return result[0].name;
            });
        }

Answer 1

Your function will return a promise, get the result through then

function test(id) {
            return  myService.getById(id).then(function (result) {
                return result[0].name;
            });
}

test(2).then(function(test) {
  //some code
});

Answer 2

In fact, I’m not very familiar with promises, but in this context, the task is better to solve with an event approach:

function test(id) {
  return  myService.getById(id).then(function (result) {
      onEndTest(result);
  });
}

function onEndTest(result) {
  // обработка результата
}