hey-cli/src/babel.js

webpack脚手架，hot-dev-server，build

const utils = require('./util/utils');

module.exports = (conf) => {
  let babelConfig = {};
  babelConfig.presets = [[require.resolve('@babel/preset-env'), {
    useBuiltIns: 'entry',
    corejs: 2,
    targets: "> 0.25%, not dead, not ie <= 8"
  }]];
  babelConfig.plugins = [
    require.resolve('@babel/plugin-syntax-dynamic-import'),
    require.resolve('@babel/plugin-transform-runtime')
  ];

  if (conf.react) {
    babelConfig.presets.push([require.resolve('@babel/preset-react')]);
  }

  if (conf.webpack.pluginImport) {
    let pluginImport = conf.webpack.pluginImport;
    if(utils.isArray(pluginImport)) {
      for(let p of pluginImport) {
        babelConfig.plugins.push([require.resolve('babel-plugin-import'), p, p.libraryName]);
      }
    } else {
      babelConfig.plugins.push([require.resolve('babel-plugin-import'), pluginImport, pluginImport.libraryName]);
    }
  }

  babelConfig.plugins.push([require.resolve('@babel/plugin-transform-spread'), { loose: false }]);
  babelConfig.plugins.push([require.resolve('@babel/plugin-transform-async-to-generator')]);
  babelConfig.plugins.push([require.resolve('@babel/plugin-transform-flow-strip-types')]);
  babelConfig.plugins.push([require.resolve('@babel/plugin-proposal-object-rest-spread'), { "loose": true, "useBuiltIns": true }]);
  babelConfig.plugins.push([require.resolve('@babel/plugin-transform-modules-commonjs')]);
  babelConfig.plugins.push([require.resolve('@babel/plugin-transform-object-assign')]);
  babelConfig.plugins.push([require.resolve('@babel/plugin-syntax-object-rest-spread')]);
  babelConfig.plugins.push([require.resolve('babel-plugin-transform-es2015-spread'), {loose: true}]);
  

  return babelConfig;
};