disableCssExtraction(disabled = true) {
        webpackConfig.disableCssExtraction(disabled);

        return this;
    }
Call this if you don't want imported CSS to be extracted
into a .css file. All your styles will then be injected
into the page by your JS code.

This can be useful when using the dev-server with hot
module reload (so that CSS can benefit from HMR):

```
// disable CSS only when using the dev-server
Encore.disableCssExtraction(Encore.isDevServer())
```

Internally, this disables the mini-css-extract-plugin
and uses the style-loader instead.

@param {boolean} disabled
@returns {Encore}