javascript - throw Error('msg') vs throw new Error('msg')

Question

var err1 = Error('message');
var err2 = new Error('message');

What's the difference? Looking at them in the chrome console, they look identical. Same properties on the object and the same __proto__ chain. Almost seems like Error acts like a factory.

Which one is correct and why?

Answer 1

Both are fine; this is explicitly stated in the specification:

... Thus the function call Error(…) is equivalent to the object creation expression new Error(…) with the same arguments.