tkctly

```javascript console.log(a.x); // undefined console.log(b.x); //{n:2} ``` > [一些相关分析](https://juejin.im/post/5d4d1c6fe51d453c11684c20)

I found a description for an option with this document [#devserverstdin---cli-only](https://webpack.js.org/configuration/dev-server/#devserverstdin---cli-only). But when I use `--stdin`, it throw an Error: `ValidationError: webpack Dev Server Invalid Options` The code about this...

> @Jfreey please tell the version of `wepack`, `webpack-cli` & `webpack-dev-server`. @snitin315 Please check This is the `package.json` from the demo project: ```json { "name": "dev_server_stdin_bug", "version": "1.0.0", "main": "index.js",...