其他配置都正常。
在执行gulp replaceJs js 代码压缩时报错

internal/streams/legacy.js:59
      throw er; // Unhandled stream error in pipe.
      ^
Error: Couldn't find preset "react" relative to directory .....

解决：

npm install react react-dom –save
npm install babel-core babel-loader babel-preset-react –save-dev
npm install webpack –save-dev

最后再执行

gulp replaceJs

返回正常

来源https://www.onmpw.com/tm/xwzj/web_150.html