CODEWITHSUNDEEP
node.jsyarnpkg
Brian Lee
Brian Lee

Reputation: 31

How do I configure my babel/preset-env in my package.json file?

I'm trying to learn machine learning with JavaScript on my own but I'm having trouble even setting up my package.json file. I've Googled everywhere and tried different things but I keep on getting the following error

$ browserify src/index.js --node -o dist/index.js -t [ babelify --presets [ env ] ]
TypeError: Cannot read property 'bindings' of null while parsing file: C:\Users\Brian\Desktop\MLinJSBook\Ch1-Ex1\src\greeting.js

And here's my Here's my package.json file

{
  "name": "Ch1-Ex1",
  "version": "1.0.0",
  "main": "src/index.js",
  "license": "MIT",
  "scripts": {
    "build-web": "browserify src/index.js -o dist/index.js -t [ babelify --presets [ env ] ]",
    "build-cli": "browserify src/index.js --node -o dist/index.js -t [ babelify --presets [ env ] ]",
    "start": "yarn build-cli && node dist/index.js"
  },
  "devDependencies": {
    "@babel/cli": "^7.2.0",
    "@babel/preset-env": "^7.2.0",
    "babel-preset-env": "^1.7.0",
    "babel-preset-react-native": "^4.0.1",
    "babelify": "^10.0.0",
    "browserify": "^16.2.3"
  },
  "dependencies": {
    "@babel/core": "^7.2.0"
  }
}

And my code greetingg.js

const greeting = name => 'Hello, ' + name + '!';
export default greeting;

index.js

import greeting from './greeting';
console.log(greeting(process.argv[2] || 'world'));

I think I'm not configuring my babel/preset-env correctly but I everything I've tried is not working. Any help is much appreciated!

Upvotes: 3

Views: 1807

Answers (1)

J. Ghyllebert
J. Ghyllebert

Reputation: 2027

If you use Babel 7 you have to update your command to use "@babel/preset-env" instead of env in presets.

$ browserify src/index.js --node -o dist/index.js -t [ babelify --presets ["@babel/preset-env" ] ]

Source: https://babeljs.io/docs/en/env/

Upvotes: 0

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