babel-plugin-define-variables

babel-plugin-define-variables

a babel plugin that like webpack.DefinePlugin

installtion

  npm install --save-dev babel-plugin-define-variables
  // or 
  yarn add -D babel-plugin-define-variables

config

// babel.config.js
module.exports = {
  presets: [
    ...
  ],
  plugins: [
    [
      'babel-plugin-define-variables',
      {
        defines: {
          'process.env.BUILD_ENV': process.env.BUILD_ENV,
          'process.env.NODE_ENV': process.env.NODE_ENV,
        }
      }
    ],
   ...
  ]
};

built-in define

• __filename

  the filename of code file than relative of package.json path that current project.

• __dirname

  the dirname of code file than relative of package.json path that current project.

• __now

  the time that build moment. format: 'yyyy-MM-dd hh:mm:ss'

• __timestamp

  the timestamp that build moment.

• __packagename

  the package name of this project.

• __packageversion

  the package version of this project. you can also use like this:

  __packageversion('react');
  

  that you will get version of react;