async function getSomething(parameter) {
  ...
}

function myFunction() {
  const params = [param1, param2, ...]
  const results = []
  let i = 0

  params.forEach((param) => {
    getSomething(param).then((result) => results[i++] = result)
  })
  
  console.log(results)
}

results is empty because the calls in the for are asynchronous and not yet executed.

How can I wait that all Promise in the for loop are resolved ?

async function getSomething(parameter) {
  ...
}

function myFunction() {
  const params = [param1, param2, ...]
  const results = []
  let i = 0

  params.forEach((param) => {
    getSomething(param).then((result) => results[i++] = result)
  })
  
  console.log(results)
}

results is empty because the calls in the for are asynchronous and not yet executed.

How can I wait that all Promise in the for loop are resolved ?

• javascript
• node.js

• 3 developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/… – ADyson Commented Jan 19 at 14:58
• 3 Alternatively, Promise.allSettled to allow individual tasks to fail. – samthecodingman Commented Jan 19 at 15:20

1 Answer 1

You can use Promise.all to your advantage. It will allow you to wait until an array of promises gets resolved.

Refer the below code for reference:

async function getSomething(parameter) {
  // Your business logic here
}

async function myFunction() {
  const params = [param1, param2, ...];
  const results = await Promise.all(params.map(param => getSomething(param))); // Use Promise.all get the results in order
  console.log(results);
}