Wait until all promises complete even if some rejected

Question

Let\'s say I have a set of Promises that are making network requests, of which one will fail:

// http://does-not-exist will throw a TypeError
va         


        

Answer 1

Instead of rejecting, resolve it with a object. You could do something like this when you are implementing promise

const promise = arg => {
  return new Promise((resolve, reject) => {
      setTimeout(() => {
        try{
          if(arg != 2)
            return resolve({success: true, data: arg});
          else
            throw new Error(arg)
        }catch(e){
          return resolve({success: false, error: e, data: arg})
        }
      }, 1000);
  })
}

Promise.all([1,2,3,4,5].map(e => promise(e))).then(d => console.log(d))