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

As of TypeScript 2.2 it can be done via new.target.prototype. https://www.typescriptlang.org/docs/handbook/release-notes/typescript-2-2.html#example

class CustomError extends Error {
    constructor(message?: string) {
        super(message); // 'Error' breaks prototype chain here
        this.name = 'CustomError';
        Object.setPrototypeOf(this, new.target.prototype); // restore prototype chain
    }
}