Console.log the output of an async function directly?

Question

I am running this async function:

async function getIngress(namespace) {
  try {
    const result = await k8sIngressApi.listNamespacedIngress(namespace, true);
    return result.body.items[0].spec.rules[0].http.paths[0].path;
  } catch (e) {
    console.error(e.response.body);
  }
}
console.log(getIngress(argument);

The console log only prints a promise. Is there a way I can access the returned value of the promise outside of a function like I am trying to?

score 5 · Accepted Answer · answered Apr 30 '20 at 15:47

Yes, you can! I'll give you three ways:

Using async function

async function logPromiseResult() {
  console.log(await getIngress(argument));
}

Using .then callback

getIngress(argument).then(result => console.log(result));

Or you just can change that function definition

async function getIngress(namespace) {
    let response;
    try {
        const result = await k8sIngressApi.listNamespacedIngress(namespace, true);
        response = result.body.items[0].spec.rules[0].http.paths[0].path;
    } catch (e) {
        console.error(e.response.body);
    }
    console.log(response);
    return response;
}

Hope that this is what you need and it helps you!

score 2 · Answer 2 · answered Apr 30 '20 at 15:37

2

await should work.

console.log(await getIngress(argument));

answered Apr 30 '20 at 15:37

Radu Diță

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Assuming the `console.log` is located in an async function otherwise he would get an error message for using `await` outside `async`. – Mickael B. Apr 30 '20 at 15:44
Yup, you are right – Radu Diță Apr 30 '20 at 16:10

score 1 · Answer 3 · answered Apr 30 '20 at 15:41

1) getIngress(argument).then(console.log)

or the same: getIngress(argument).then(res => console.log(res))

2) await getIngress(argument), but it works only inside async function:

you should make async IIFE if your outside function isn't async or it is top level:

(async () => {
  console.log(await getIngress(argument))
})();

Console.log the output of an async function directly?

3 Answers3