To get return value from setTimeout with JavaScript, we can create a promise from the setTimeout code.
For instance, we write
const x = () => {
const promise = new Promise((resolve, reject) => {
window.setTimeout(() => {
resolve("done!");
});
});
return promise;
};
const y = async () => {
const result = await x();
console.log(result);
};
to define function x that returns a promise created with the Promise constructor.
We call it with a callback that calls setTimeout with a callback that calls resolve to return the resolve value of the promise.
Then we return the promise.
Next, we define function y that calls x and gets the resolved value with await.
Therefore, result is 'done!'.
