css-loader: style is not affective on vue demo

• Operating System: window10
• Node Version: v10.15.3
• NPM Version: 6.4.1
• webpack Version: 4.44.1
• css-loader Version: 4.2.0

Expected Behavior

I use wepback make a simple vue demo, try to use scss-loader parse scss style, expect below picture

Actual Behavior

but，now is this picture. You can css style is not become effective, because <style> attribute is not appear to html.

Code

{
        test: /\.scss$/,
        use: [
          {
            loader: 'vue-style-loader',
            options: {
              // sourceMap: false,
              // shadowMode: false,
            },
          },
          {
            loader: 'css-loader',
            options: {
              // sourceMap: false,
              // importLoaders: 2,
              // modules: {
              //   localIdentName: '[name]_[local]_[hash:base64:5]',
              // },
            },
          },
          {
            loader: 'sass-loader',
            options: {
              sourceMap: false,
            },
          },
        ],
      }

// additional code, HEY YO remove this block if you don't need it

Solution

I try to downgrade css-loader to 3.5.3，webpack builded ok，I dont know why is it.