chelvc-custom/babel.config.js

const webpack = require('webpack');
const plugins = [];

if (process.env.UNI_OPT_TREESHAKINGNG) {
  plugins.push(require('@dcloudio/vue-cli-plugin-uni-optimize/packages/babel-plugin-uni-api/index.js'));
}

if ((process.env.UNI_PLATFORM === 'app-plus' && process.env.UNI_USING_V8) || (process.env.UNI_PLATFORM === 'h5' && process.env.UNI_H5_BROWSER === 'builtin')) {
  const path = require('path');

  const isWin = /^win/.test(process.platform);

  const normalizePath = path => (isWin ? path.replace(/\\/g, '/') : path);

  const input = normalizePath(process.env.UNI_INPUT_DIR);
  try {
    plugins.push([
      require('@dcloudio/vue-cli-plugin-hbuilderx/packages/babel-plugin-console'),
      {
        file(file) {
          file = normalizePath(file);
          if (file.indexOf(input) === 0) {
            return path.relative(input, file);
          }
          return false;
        },
      },
    ]);
  } catch (e) {}
}

process.UNI_LIBRARIES = process.UNI_LIBRARIES || ['@dcloudio/uni-ui'];
process.UNI_LIBRARIES.forEach(libraryName => {
  plugins.push([
    'import',
    {
      libraryName: libraryName,
      customName: name => {
        return `${libraryName}/lib/${name}/${name}`;
      },
    },
  ]);
});

if (process.env.UNI_PLATFORM !== 'h5') {
  plugins.push('@babel/plugin-transform-runtime');
}

const config = {
  presets: [
    [
      '@vue/app',
      {
        modules: webpack.version[0] > 4 ? 'auto' : 'commonjs',
        useBuiltIns: process.env.UNI_PLATFORM === 'h5' ? 'usage' : 'entry',
      },
    ],
  ],
  plugins,
};

const UNI_H5_TEST = '**/@dcloudio/uni-h5/dist/index.umd.min.js';
if (process.env.NODE_ENV === 'production') {
  config.overrides = [
    {
      test: UNI_H5_TEST,
      compact: true,
    },
  ];
} else {
  config.ignore = [UNI_H5_TEST];
}

module.exports = config;