Promise

const p = new Promise((resolve, reject) => {
 setTimeout(()=>{
    //resolve(1);
    reject(new Error('message'));
 }, 2000);
});

p
  .then(result => console.log('Result', result))
  .catch(err=> console.log('Error', err.message));

Promise.all

 const p1 = new Promise((resolve) => {
 setTimeout(()=>{
    console.log('Async 1');
    resolve(1);
     
 },2000);
});

 const p2 = new Promise((resolve) => {
 setTimeout(()=>{
    console.log('Async 2');
    resolve(2);
     
 },2000);
});

Promise.all([p1, p2])
  .then(result => console.log(result));

if one on them rejected end result returns rejected

Promise.race

if one of the promises fulllfilled result returns.