Call async from non-async
We have a “regular” function. How to call async
from it and use its result?
async function wait() {
await new Promise(resolve => setTimeout(resolve, 1000));
return 10;
}
function f() {
// ...what to write here?
// we need to call async wait() and wait to get 10
// remember, we can't use "await"
}
P.S. The task is technically very simple, but the question is quite common for developers new to async/await.
That’s the case when knowing how it works inside is helpful.
Just treat async
call as promise and attach .then
to it:
async function wait() {
await new Promise(resolve => setTimeout(resolve, 1000));
return 10;
}
function f() {
// shows 10 after 1 second
wait().then(result => alert(result));
}
f();