Module not found: Error: Can't resolve 'core-js?

Question

JavaScript

This is the error that appears when trying to use fetch.

fetch('http://localhost:3000/ff/sign-up')
                        .then(result => result.json())
                        .then(result => console.log(result))
                        .catch((err) => console.log(err));

What is the problem?

Answer 1

This is how it should work