Do you know what will be the output of this code? new Promise((resolve) => { resolve("first"); resolve("second"); }).then(console.log);

What happens if you call resolve twice in a Promise?

Do you know what will be the output of this code?

JavaScript

new Promise((resolve) => {
  resolve("first");
  resolve("second");
}).then(console.log);

Show answer and explanation

The answer is "first".

Once a promise is fulfilled or rejected, its state is locked. The second resolve call does nothing and throws no error.