mini-css-extract-plugin can not be separated css

mini-css-extract-plugin can not be separated css

mini-css-extract-plugin unable seperate css file

Possible Reason 1:

html-inline-css-webpack-plugin plugin with conflict.

webpack4 have configured the mini-css-extract-plugin, but it can not generate css file package. solve

Possible Cause 2

package.json inside sideEffects removed

Packing css webpack4 can not be extracted as a separate file (mini-css-extract-plugin)