#348 Promise Resolution Order

easy

javascript

promises

What will be the order of following code:

new Promise((resolve, reject) => {
  resolve(1);
  resolve(2);
  reject("error");
}).then(
  (value) => {
    console.log(value);
  },
  (error) => {
    console.log("error");
  },
);

new Promise((resolve, reject) => {
  resolve(1);
  resolve(2);
  reject("error");
}).then(
  (value) => {
    console.log(value);
  },
  (error) => {
    console.log("error");
  },
);

Select one of the following:

The code will output:

This is because:

In a Promise, only the first resolve() or reject() call takes effect
Once a Promise is settled (either resolved or rejected), it cannot change its state
In this case, resolve(1) is called first, so the subsequent resolve(2) and reject('error') are ignored
The .then() handler receives the value from the first resolve(1) call and logs it