module.exports = {
  presets: [
    '@vue/cli-plugin-babel/preset',
    '@babel/preset-env'  // 使用 Babel 的预设来编译 ES6+ 代码
  ],
  env: {
    development: {
      // babel-plugin-dynamic-import-node plugin only does one thing by converting all import() to require().
      // This plugin can significantly increase the speed of hot updates, when you have a large number of pages.
      // https://panjiachen.github.io/vue-element-admin-site/guide/advanced/lazy-loading.html
      plugins: ['dynamic-import-node', '@babel/plugin-proposal-class-properties','@babel/plugin-proposal-private-methods','@babel/plugin-proposal-optional-chaining']
    }
  }
}