Sometimes, we want to use promise function inside JavaScript array map.
In this article, we’ll look at how to use promise function inside JavaScript array map.
How to use promise function inside JavaScript array map?
To use promise function inside JavaScript array map, we use the Promise.all function.
For instance, we write
const mappedArray = await Promise.all(
array.map(async (p) => {
const i = await getPromise(p);
return i.item;
})
);
to call array.map with an async function that returns a promise with i.item as its resolve value.
map returns an array of promises with their resolve values.
Then we use Promise.all to run all the promises and get their resolve values with await.
Conclusion
To use promise function inside JavaScript array map, we use the Promise.all function.
