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@babel/core doesn't seem to load .babelrc #8971

kevin-de-coninck opened this Issue Nov 4, 2018 · 1 comment


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kevin-de-coninck commented Nov 4, 2018

Bug Report

Current Behavior
@babel/register doesn't seem to use .babelrc file.

Input Code
I have the following TypeScript file containing some tests:

import { expect } from 'chai';

describe('sample', (): void => {
  it('Returns false', (): void => {

My package.json contains the following script:

"scripts": {
	"test": "npx mocha --require @babel/register spec/**/*.spec.ts"

The following error is throwed when invoking the script:

import { expect } from 'chai';

SyntaxError: Unexpected token import
    at createScript (vm.js:80:10)
    at Object.runInThisContext (vm.js:139:10)
    at Module._compile (module.js:617:28)
    at Module._extensions..js (module.js:664:10)
    at Object.newLoader [as .js] (C:\Users\kevin\Development\Node.JS\Datalytics\Server\Services\Datalytics.Services.Logging\node_modules\pirates\lib\index.js:88:7)
    at Module.load (module.js:566:32)
    at tryModuleLoad (module.js:506:12)
    at Function.Module._load (module.js:498:3)
    at Module.require (module.js:597:17)
    at require (internal/module.js:11:18)
    at C:\Users\kevin\Development\Node.JS\Datalytics\Server\Services\Datalytics.Services.Logging\node_modules\mocha\lib\mocha.js:250:27
    at Array.forEach (<anonymous>)
    at Mocha.loadFiles (C:\Users\kevin\Development\Node.JS\Datalytics\Server\Services\Datalytics.Services.Logging\node_modules\mocha\lib\mocha.js:247:14)
    at (C:\Users\kevin\Development\Node.JS\Datalytics\Server\Services\Datalytics.Services.Logging\node_modules\mocha\lib\mocha.js:576:10)
    at Object.<anonymous> (C:\Users\kevin\Development\Node.JS\Datalytics\Server\Services\Datalytics.Services.Logging\node_modules\mocha\bin\_mocha:637:18)
    at Module._compile (module.js:653:30)
    at Object.Module._extensions..js (module.js:664:10)
    at Module.load (module.js:566:32)
    at tryModuleLoad (module.js:506:12)
    at Function.Module._load (module.js:498:3)
    at Function.Module.runMain (module.js:694:10)
    at startup (bootstrap_node.js:204:16)
    at bootstrap_node.js:625:3

Expected behavior/code
The tests should be executed.

Babel Configuration (.babelrc, package.json, cli command)

	"presets": [
	"plugins": [
	"comments": false


  • Babel packages:
		"@babel/core": "^7.1.2",
		"@babel/plugin-proposal-class-properties": "^7.1.0",
		"@babel/plugin-proposal-object-rest-spread": "^7.0.0",
		"@babel/preset-env": "^7.1.0",
		"@babel/preset-typescript": "^7.1.0",
		"@babel/register": "^7.0.0",
  • Node/npm version: Node 8.12.0 / NPM 6.4.1
  • OS: Windows 10
  • How you are using Babel: register

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babel-bot commented Nov 4, 2018

Hey @kevin-de-coninck! We really appreciate you taking the time to report an issue. The collaborators
on this project attempt to help as many people as possible, but we're a limited number of volunteers,
so it's possible this won't be addressed swiftly.

If you need any help, or just have general Babel or JavaScript questions, we have a vibrant Slack
community that typically always has someone willing to help. You can sign-up here
for an invite.

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