Builtin Class Decorator

A TypeScript class decorator for extending builtin classes in ES5.

Install

$ npm i @typescript-plus/builtin-class-decorator --save

Summary

When the compile target is es5, to correctly extend the builtin classes, such as Array, Map and Error, you need to do this workaround.

With Builtin Class Decorator, you can simply do it.

Usage

import { Es5BuiltinClass } from '@typescript-plus/builtin-class-decorator';

@Es5BuiltinClass()
class SpecialError extends Error {
  constructor() {
    super();
  }
}

const error = new SpecialError();
error instanceof Error; // true
error instanceof SpecialError; // true