“async and await” Code Answer’s

how to make an async function

javascript by Crossed Face on Mar 03 2020 Donate

function resolveAfter2Seconds() {
  return new Promise(resolve => {
    setTimeout(() => {
      resolve('resolved');
    }, 2000);
  });
}

//async function:
async function asyncCall() {
  console.log('calling');
  const result = await resolveAfter2Seconds();
  console.log(result);
  // expected output: 'resolved'
}

asyncCall();

async await

whatever by Yawning Yak on Jun 18 2020 Donate

async function f() {

  try {
    let response = await fetch('/no-user-here');
    let user = await response.json();
  } catch(err) {
    // catches errors both in fetch and response.json
    alert(err);
  }
}

f();

Source: javascript.info

async and await

javascript by Creepy Gábor

on Nov 26 2020 Donate

function delayResult() {
 return new Promise(resolve => {
   setTimeout(() => {
     resolve(‘Done’);
   }, 5000)
 })
}
async function getResult() {
 let result = await delayResult();
 return result;
}
getResult();

Source: developer.mozilla.org

async

whatever by Poor Pygmy on May 29 2020 Donate

function resolveAfter2Seconds() {
  return new Promise(resolve => {
    setTimeout(() => {
      resolve('resolved');
    }, 2000);
  });
}

async function asyncCall() {
  console.log('calling');
  const result = await resolveAfter2Seconds();
  console.log(result);
  // expected output: 'resolved'
}

asyncCall();

Source: developer.mozilla.org

javascript return value from async function

javascript by Grepper

on Aug 02 2019 Donate

-1

//you can only return a value from an async function by passing in a callback function like so: 
function longRunningFunction(param1, callback){
    setTimeout(function(){
         var results="O High there!";
         callback(results);
    }, 2000);
} 

//then call the async function and pass the callback function like so
longRunningFunction("morning", function(result){
  alert(result);
});