ryanwang

> yeah Perhaps, it's a webpack [bug](https://lightrun.com/answers/webpack-webpack-dev-middleware-outputclean--true-is-not-working-with-dev-server).

https://github.com/webpack/webpack-dev-middleware/issues/861

So, we still need `clean-webpack-plugin`.

> understood, but it's not necessary, I mean you don't have to set "writeToDisk: true" As tool, we should not say someway not necessary, we need debug and check it's...

> sorry, i don't understand,where is this option you can check this [line](https://github.com/myNameIsDu/aktiv/blob/master/packages/cli/ak-webpack-config/lib/loaders/defaultLoaders.js#L39)

> it's ok, because the type is "boolean | Record" The function only handle the `boolean` type, when I use `number`？`symbol`? `set`......