What is the correct way of catching an error?

Question

How can i set a variable to the message of an error? This is my code:

 .catch(console.error).then((err) => {
  var x = err.message;
 )};

And i am getting this error:

Cannot read property 'message' of undefined

Answer 1

You get the error in the catch call:

.catch((err) => {
    console.error(err);
    var x = err.message;
});