webpacker: [ts] Property `context` does not exist on type 'NodeRequire'

Hi there!

Thanks for all your hard work on webpacker, it’s excellent! I’m having a bit of an issue using typescript and stimulus on Rails 5.1 and webpacker 3.2.2.

I installed webpacker, typescript and stimulus using the following:

bundle exec rails webpacker:install
bin/rails webpacker:install:typescript
bin/rails webpacker:install:stimulus

Create a file called application.ts:

import { Application } from "stimulus"
import { definitionsFromContext } from "stimulus/webpack-helpers"

const application = Application.start()
const context = require.context("controllers", true, /.ts$/)
application.load(definitionsFromContext(context))

I get a compiler error at

const context = require.context("controllers", true, /.ts$/) // [ts] Property 'context' does not exist on type 'NodeRequire'.

My tsconfig.json:

{
  "compilerOptions": {
    "declaration": false,
    "emitDecoratorMetadata": true,
    "experimentalDecorators": true,
    "lib": ["es6", "dom"],
    "module": "es6",
    "moduleResolution": "node",
    "sourceMap": true,
    "target": "es5",
    "types": [
      "webpack",
      "webpack-env"
    ]
  },
  "exclude": [
    "**/*.spec.ts",
    "node_modules",
    "vendor",
    "public"
  ],
  "compileOnSave": false
}

My package.json

{
  "name": "canopy",
  "private": true,
  "dependencies": {
    "@rails/webpacker": "^3.2.2",
    "stimulus": "^1.0.1",
    "ts-loader": "^3.5.0",
    "typescript": "^2.7.2"
  },
  "version": "1.0.0",
  "repository": "git@github.com:sunnyrjuneja/canopy.git",
  "author": "Sunny Juneja <jr.sunny@gmail.com>",
  "devDependencies": {
    "@types/webpack": "^3.8.8",
    "@types/webpack-env": "^1.13.5",
    "webpack-dev-server": "^2.11.1"
  }
}

My understanding is the types: […] in tsconfig would solve this problem. It’s why reaching out here.