尝试使用babel-cli将es6代码编译为es5时出错

Question

I'm getting an error saying " unexpected token export " when trying to compile some es6 code using " babel-cli " with the presets " es2015 " and " stage-2 ". I'm trying to export a function from the " test.js " file and import it in the " index.js " file but for some reason it doesn't accept " export " in " test.js ".

Each module is installed locally, so I run it from the package.json "scripts" using "build: babel server/index.js -o server/index.babel.js".

My " .babelrc " file consists of:

 {
  "presets": ["es2015", "stage-2"]
 }

test.js:

const test = (msg) => {
    console.log(msg)
};

export default test;

index.js:

index.js:

import test from './test'

test("Hello")

Any help is much appreciated.

Answer 1

Your code looks fine, and the fact that you're getting that error means that it is reading the files properly. Make sure that you downloaded stage-2 correctly, but I think your error is in that export default is still in stage-1 .

Run npm install --save-dev babel-preset-stage-1 and add stage-1 to your presets.

That should do it. Here's a link to https://github.com/leebyron/ecmascript-export-default-from and https://github.com/leebyron/ecmascript-export-ns-from