无法在CLI上运行babel命令

Question

I am trying to install flow as docs suggests https://flow.org/en/docs/install/ It requires to install babel-cli to run babel .

I installed babel-cli using below command https://babeljs.io/docs/usage/cli/

npm install --save-dev babel-cli

> npm install --save-dev babel-cli
todo-app@0.1.0 D:\React JS\todo-app
`-- babel-cli@6.24.1

npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@^1.0.0 (node_modules\chokidar\node_modules\fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@1.1.2: wanted {"os":"darwin","arch":"any"} (current: {"os":"win32","arch":"x64"})
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@1.0.17 (node_modules\react-scripts\node_modules\fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@1.0.17: wanted {"os":"darwin","arch":"any"} (current: {"os":"win32","arch":"x64"})
npm WARN enoent ENOENT: no such file or directory, open 'D:\React JS\todo-app\node_modules\acorn-dynamic-import\package.json'
npm WARN enoent ENOENT: no such file or directory, open 'D:\React JS\todo-app\node_modules\create-hmac\package.json'
npm WARN enoent ENOENT: no such file or directory, open 'D:\React JS\todo-app\node_modules\create-hash\package.json'
npm WARN enoent ENOENT: no such file or directory, open 'D:\React JS\todo-app\node_modules\diffie-hellman\package.json'
npm WARN enoent ENOENT: no such file or directory, open 'D:\React JS\todo-app\node_modules\pbkdf2\package.json'

package.json

{
  "name": "todo-app",
  "version": "0.1.0",
  "private": true,
  "dependencies": {
    "react": "^15.5.4",
    "react-dom": "^15.5.4",
    "react-redux": "^5.0.5",
    "react-tap-event-plugin": "^2.0.1",
    "redux": "^3.6.0"
  },
  "devDependencies": {
    "babel-cli": "^6.24.1",
    "react-scripts": "1.0.7",
    "redux-devtools": "^3.4.0",
    "webpack": "^2.6.1"
  },
  "scripts": {
    "start": "react-scripts start",
    "build": "react-scripts build",
    "test": "react-scripts test --env=jsdom",
    "eject": "react-scripts eject"
  }
}

When I run babel command then it gives me an error 'babel' is not recognized as an internal or external command, operable program or batch file.

Update

It is because "local binaries probably aren't found because the local ./node_modules/.bin is not in $PATH" - but do you think Is it good to add node_modules/.bin of all projects in a $PATH ? or Is there any alternative to do ?

PS: I am on windows machine.

Answer 1

Add a babel script in your package.json

"scripts": {
  "start": "react-scripts start",
  "build": "react-scripts build",
  "test": "react-scripts test --env=jsdom",
  "eject": "react-scripts eject",
  "babel": "babel"
}

Then you can run babel with:

npm run babel

If you want to pass arguments when running from the command line, separate them from the command with -- (more info) . For example:

npm run babel -- --help

This way you run the version of babel specified in package.json and installed by npm and you do not need to edit your PATH variable.

Note: This is the same approach as flow recommends for itself in its installation instructions, . (Switch it to npm at the top then scroll down to "Setup Flow")