Typescript - Extending Error class

Question

I\'m trying to throw a custom error with my \"CustomError\" class name printed in the console instead of \"Error\", with no success:

class CustomError extend         


        

Answer 1

I ran into the same problem in my typescript project a few days ago. To make it work, I use the implementation from MDN using only vanilla js. So your error would look something like the following:

function CustomError(message) {
  this.name = 'CustomError';
  this.message = message || 'Default Message';
  this.stack = (new Error()).stack;
}
CustomError.prototype = Object.create(Error.prototype);
CustomError.prototype.constructor = CustomError;

throw new CustomError('foo');

It doesn't seem to work in SO code snippet, but it does in the chrome console and in my typescript project: