type and import the importer

src/cli/index.ts

@@ -30,9 +30,8 @@ import HttpStream from '../formatter/http_stream'
 import { promisify } from 'util'
 import { Writable } from 'stream'
 import { pathToFileURL } from 'url'
+import importer from '../importer'
 
-// eslint-disable-next-line @typescript-eslint/no-var-requires
-const { importer } = require('../importer')
 const { incrementing, uuid } = IdGenerator
 
 export interface ICliRunResult {

src/formatter/builder.ts

@@ -21,8 +21,7 @@ import { IParsedArgvFormatOptions } from '../cli/argv_parser'
 import { SnippetInterface } from './step_definition_snippet_builder/snippet_syntax'
 import HtmlFormatter from './html_formatter'
 import { pathToFileURL } from 'url'
-// eslint-disable-next-line @typescript-eslint/no-var-requires
-const { importer } = require('../importer')
+import importer from '../importer'
 
 interface IGetStepDefinitionSnippetBuilderOptions {
   cwd: string

src/importer.js

@@ -4,8 +4,12 @@ without having it transpiled down to commonjs `require()` by TypeScript.
 See https://github.com/microsoft/TypeScript/issues/43329.
  */
 
-module.exports = {
-  importer: async (descriptor) => {
-    return await import(descriptor)
-  },
+/**
+ * @param {any} descriptor - A URL or path for the module to load
+ * @return {Promise<any>} Promise that resolves to the loaded module
+ */
+async function importer(descriptor) {
+  return await import(descriptor)
 }
+
+module.exports = importer

src/runtime/parallel/worker.ts

@@ -19,9 +19,8 @@ import { IRuntimeOptions } from '../index'
 import { PredictableTestRunStopwatch, RealTestRunStopwatch } from '../stopwatch'
 import { duration } from 'durations'
 import { pathToFileURL } from 'url'
+import importer from '../../importer'
 
-// eslint-disable-next-line @typescript-eslint/no-var-requires
-const { importer } = require('../../importer')
 const { uuid } = IdGenerator
 
 type IExitFunction = (exitCode: number, error?: Error, message?: string) => void

tsconfig.json

@@ -1,5 +1,6 @@
 {
   "compilerOptions": {
+    "allowJs": true,
     "esModuleInterop": true,
     "lib": ["es2019"],
     "module": "commonjs",