I'm trying to use the code in this SO answer. It uses Reflect. Here's a copy:

export function CustomComponent(annotation: any) {

  return function (target: Function) {

    var parentTarget = Object.getPrototypeOf(target.prototype).constructor;

    var parentAnnotations = Reflect.getMetadata('annotations', parentTarget);



    var parentAnnotation = parentAnnotations[0];

    Object.keys(parentAnnotation).forEach(key => {

      if (isPresent(parentAnnotation[key])) {

        annotation[key] = parentAnnotation[key];

      }

    });

    var metadata = new ComponentMetadata(annotation);



    Reflect.defineMetadata('annotations', [ metadata ], target);

  }

}

First, I got these two errors:

Property 'getMetadata' does not exist on type 'typeof Reflect'.

Property 'defineMetadata' does not exist on type 'typeof Reflect'.

Then I ran npm install reflect-metadata, but I don't know how to use it.

import { Reflect } from reflect-metadata;



Module '.../node_modules/reflect-metadata/index' has no exported

member 'Reflect'.

Or

import { Reflect } from 'reflect-metadata/Reflect';



Cannot find name 'Record'. 

Type '{}' is not assignable to type 'V'.

File '.../node_modules/reflect-metadata/Reflect.ts' is not a module.

Or

import reflect-metadata



rollup: Treating 'fs' as external dependency 

bundle update failed: Error transforming .../node_modules/typescript/lib/typescript.js

with 'commonjs' plugin: The keyword 'package' is reserved (57066:28) in

.../node_modules/typescript/lib/typescript.js 

Or

var reflect = require(reflect-metadata);



Cannot find name 'require'.

Or

declare var require: any;

var reflect = require(reflect-metadata);

var Reflect = reflect.Reflect;



    rollup: Treating 'fs' as external dependency 

bundle update failed: Error transforming .../node_modules/typescript/lib/typescript.js

with 'commonjs' plugin: The keyword 'package' is reserved (57066:28) in

.../node_modules/typescript/lib/typescript.js

Surely I'm just missing something silly, even a typo. What can I do to use this code?