Javascript 在babel6中使用transform decorators legacy

我以前收到过这个错误消息

Syntax Error: Decorators are not officially supported yet in 6.x pending a proposal update.
However, if you need to use them you can install the legacy decorators transform with:

npm install babel-plugin-transform-decorators-legacy --save-dev

and add the following line to your .babelrc file:

{
  "plugins": ["transform-decorators-legacy"]
}

The repo url is: https://github.com/loganfsmyth/babel-plugin-transform-decorators-legacy.

所以，我在package.json文件中将babel插件转换装饰器添加到devDepencies 并将插件添加到.babelrc文件并安装模块。 但是我收到了这个错误信息

Module build failed: ReferenceError: Unknown plugin "transform-decorators-legacy" specified in [Project Path]