Unable to run babel via npm script “babel: command

问题:

To get started I ran:

npm install --save-dev babel-cli
npm install --save-dev babel-preset-es2015
npm install --save-dev babel-preset-stage-0 

Here is my package.json:

   {
      "scripts": {
        "build": "babel src -d dist"
      },
      "devDependencies": {
        "babel-cli": "^6.6.5",
        "babel-core": "^6.7.2",
        "babel-preset-es2015": "^6.6.0",
        "babel-preset-stage-0": "^6.5.0"
      }
    }

Here is my .babelrc file:

{
  "presets": ["es2015", "stage-0"]
}

My file structure is like this:

- Root
    - src
        - client 
        - server
        - test  
    - dist 
    - package.json

I am calling npm run build from the root folder. I am expecting it to compile the source folder into the dist folder. It runs and then I get this error:

> babel src -d dist

sh: babel: command not found

npm ERR! Darwin 15.2.0
npm ERR! argv "/usr/local/bin/node" "/usr/local/bin/npm" "run" "build"
npm ERR! node v5.8.0
npm ERR! npm  v3.7.3
npm ERR! file sh
npm ERR! code ELIFECYCLE
npm ERR! errno ENOENT
npm ERR! syscall spawn
npm ERR! redacted@1.0.0 build: `babel src -d dist`
npm ERR! spawn ENOENT
npm ERR! 
npm ERR! Failed at the redacted@1.0.0 build script 'babel src -d dist'.
npm ERR! Make sure you have the latest version of node.js and npm installed.
npm ERR! If you do, this is most likely a problem with the redacted package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR!     babel src -d dist
npm ERR! You can get information on how to open an issue for this project with:
npm ERR!     npm bugs redacted
npm ERR! Or if that isn't available, you can get their info via:
npm ERR!     npm owner ls redacted
npm ERR! There is likely additional logging output above.

npm ERR! Please include the following file with any support request:
npm ERR!     /Users/user/redacted/npm-debug.log

So as you can see, I've installed babel-cli, I've installed the presets, and I think everything is in order according to the babel docs.

Does anyone have ideas about why it wouldn't be working? Could I be missing a babel npm file? Is "babel src -d dist" incorrect?

Thanks for any help you can provide!

I made another folder and followed the same steps, it worked perfectly. For some reason it's not working in this directory.

回答1:

Did you run "npm install" to install the dev packages?

回答2:

I've come across the same issue lately. Removing the node_modules folder and running npm install again no longer fixes the issue.

The reason you are getting this error is because babel-cli needs to be installed globally, not as a project dependency.

Run npm install -g babel-cli to install it globally.

Babel-preset-es2015 can then be installed as a dev dependency for your projects npm install --save-dev babel-preset-es2015

回答3:

You should never install babel-cli globally - in fact, they specifically have an entire paragraph telling you not to from their official docs.

Edit package.json >> add a script with the key called, say, build with the value ./node_modules/.bin/babel <commands>

If you called it build, just then type npm run build.

回答4:

The error occurs because ./node_modules/.bin is not in $PATH. ./node_modules/.bin is where all the executable binaries can be found.

As recommended by the documentation, you can reference the babel cli inside of node_modules:

$ ./node_modules/.bin/babel src -d lib

You can modify your npm run build command to use this:

"scripts": {
    "build": "./node_modules/.bin/babel src -d dist"
},

回答5:

Many of the answers above are correct.

The error occurs because ./node_modules/.bin is not in $PATH. ./node_modules/.bin is where all the executable binaries can be found.

What I did was I built a simple dynamic alias function in my zshrc file.

# Babel
function bbl() {
    ./node_modules/.bin/babel "$@"
}

Now you can use bbl instead of babel

bbl --version
6.24.1 (babel-core 6.25.0)