module.exports = { // 解决线上module.exports报错 sourceType: 'unambiguous', plugins: [ '@babel/plugin-proposal-nullish-coalescing-operator', '@babel/plugin-proposal-optional-chaining' ], presets: [ '@vue/cli-plugin-babel/preset', [ '@babel/preset-env', { useBuiltIns: 'usage', corejs: 3 } ] ] }