问题描述
这是我的 babe.config.js :
module.exports = {
presets: [
'@babel/preset-react',[
'@babel/preset-env',{
modules: false,},],plugins: [
'@babel/plugin-proposal-optional-chaining','styled-components','@babel/plugin-proposal-class-properties','@babel/plugin-Syntax-dynamic-import',env: {
production: {
only: ['app'],plugins: [
'lodash','transform-react-remove-prop-types','@babel/plugin-transform-react-constant-elements',test: {
plugins: [
'@babel/plugin-transform-modules-commonjs','dynamic-import-node',};
现在我收到此错误:
Support for the experimental Syntax 'optionalChaining' isn't currently enabled (39:37):
37 |
38 | try {
> 39 | console.log('APP VERSION',process?.env?.VERSION,process?.env?.ENVIRONMENT);
| ^
40 | } catch (e) {
41 | console.error(e);
42 | }
Add @babel/plugin-proposal-optional-chaining (https://git.io/vb4Sk) to the 'plugins' section of your Babel config to enable transformation.
所以基本上 babel 忽略了 @babel/plugin-proposal-optional-chaining
应该处理 optionalChaining 的插件
解决方法
我通过简单地将 @babel/core
升级到最新版本解决了这个问题。